Dual power lightning current diverter

Abstract

The utility model discloses a double -power lightning current shunt belongs to lightning protection technical field. Including fixed shaft, double -wound spring, reel, shunt wire, nut post and base support, fixed shaft is stainless steel round steel, and both ends are equipped with arc spring fixed groove and spacing unhook structure, and double -wound spring parallel connection is wound in the fixed shaft both sides in the same direction, and one end is connected through fixed hook and fixed groove, and the other end is connected reel through nut post, and the reel is punched into shape with hem storage wire, and one end of shunt wire is connected reel, and the other end is connected through red copper tin -plating connecting plate and wire holder cooperation spacing, and the base support is U type sheet metal structure, and supports fixed shaft and spring assembly, and is equipped with folding handle, the utility model discloses parallel connection dispersion stress through double -wound spring, and spacing unhook structure prevents spring fracture, and double -wound spring backup improves reliability, and red copper tin -plating connecting plate prevents spark, and modular assembly maintenance is convenient, is applicable to lightning current shunt and flammable and explosive environment, solves traditional single -wound spring easy break, and the problem such as uneven torsion, safety redundancy is insufficient.

Description

Technical Field

[0001] This utility model belongs to the field of lightning protection technology, specifically relating to a dual-power lightning current shunt. Background Technology

[0002] In existing technologies, external floating roof tanks, due to the storage of volatile petroleum products such as crude oil and kerosene, are susceptible to lightning strikes due to their floating roof structure. Lightning protection is typically achieved by installing a lightning current shunt, which is installed at the top edge of the tank wall's angle steel. This shunt primarily relies on an internal single coil spring and a shunt line to conduct lightning current and static electricity. The coil spring's parameters are independently machined according to actual needs and used in conjunction with the equipment. However, the traditional single coil spring design has significant drawbacks: when the shunt line descends to its lowest point with the external floating roof, the coil spring must withstand maximum stress and continuously contract for 1-2 months. Under alternating stress, the metal material is prone to micro-cracks, and the bending area forms stress concentration points due to abrupt geometric changes, accelerating crack propagation to macroscopic fracture. Simultaneously, the torque of the coil spring increases non-linearly with deformation during stretching. When the shunt line is stretched to its maximum, the torque reaches its peak, potentially exceeding the withstand limit of the shunt line connectors. Furthermore, the single coil spring cannot alleviate peak torque through power distribution, relying on material strength redundancy, which still carries the risk of failure after long-term use, resulting in insufficient reliability of the lightning protection system.

[0003] A high-protection-level dual-power lightning shunt, patent application number CN2019108583932, includes a mounting bracket, a winding mechanism, a copper braided strip, and a windproof sway assembly. The winding mechanism comprises a fixed main shaft, a winding cylinder, and a rotating assembly. The fixed main shaft is fixedly mounted on the mounting bracket, and the winding cylinder is rotatably mounted on the fixed main shaft. Two sets of rotating assemblies are fixedly mounted on both sides of the winding cylinder, with the winding cylinder positioned below the rotating assemblies. The copper braided strip is wound around the winding cylinder and located between the rotating assemblies on both sides, forcing the copper braided strip to rewind and wrap around the winding cylinder. The windproof sway assembly includes a fixed base and two limiting rings. The fixed base is fixedly mounted on the mounting bracket, and two limiting rings are fixedly mounted on the fixed base, located on both sides of the winding cylinder and positioned above the rotating assemblies. This design offers advantages such as strong power and reliable operation. In the aforementioned device, the outer end of the spiral spring is fixed to the rotating housing, and the inner end is fixed to the fixed main shaft. When the copper braided belt is stretched, the springs on both sides independently store force, and the torque increases non-linearly with the amount of deformation, making it impossible to eliminate the peak value through torque complementarity. Therefore, those skilled in the art urgently need to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is that in the prior art, the above-mentioned device uses a design in which two coil springs are installed in parallel on both sides of a fixed shaft and wound in the same direction to achieve stress dispersion and extend the service life of the coil springs.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A dual-power lightning current shunt includes a fixed shaft, two sets of coil springs, a front reel, a rear reel, a shunt conductor, and a nut post. The fixed shaft is made of stainless steel round steel and has coil spring fixing grooves and limiting hook structures at both ends. The two sets of coil springs are installed in parallel on both sides of the fixed shaft and wound in the same direction. One end of each coil spring is connected to the coil spring fixing groove of the fixed shaft through a fixing hook structure, and the other end is fixed to the nut post. The front reel and the rear reel are respectively connected to the front coil spring cover plate and the rear coil spring cover plate by bolts. One end of the shunt conductor is fixed to the rear reel, and the other end is fixed to a connecting plate. The connecting plate cooperates with the conductor frame to limit the retraction position of the shunt conductor.

[0007] By adopting the above technical solution, the two coil springs are installed in parallel on both sides of the fixed shaft and wound in the same direction. This allows the stress of the two sets of coil springs to be distributed during the extension and retraction of the shunt conductor, avoiding the risk of breakage caused by long-term stress on the traditional single coil spring and significantly extending its service life. At the same time, the double coil springs wound in the same direction eliminate the torque peak during the extension and retraction process through torque complementarity, maintain constant force output, and ensure that the shunt conductor is not obstructed, making the operation more reliable. The limit hook structure of the fixed shaft and the design of the double coil springs as backups for each other form a redundant safety mechanism. Even if one coil spring fails, the other set can still maintain the basic recovery function, ensuring the uninterrupted operation of the lightning protection system. Overall, it achieves the effect of strong power and balanced force.

[0008] Furthermore, the surface of the spring fixing groove of the fixed shaft is arc-shaped, and when the spring is subjected to reverse torque, the fixing hook disengages from the fixed shaft to prevent breakage.

[0009] By adopting the above technical solution, the surface of the coil spring fixing groove of the fixed shaft adopts an arc-shaped detachable hook design. When the coil spring is subjected to reverse torque (such as excessive stretching of the shunt wire or sudden external force), the fixing hook can automatically disengage from the fixed shaft, avoiding the coil spring from breaking due to stress concentration, effectively preventing failure chain reaction, realizing overload protection, and further improving the safety and stability of the equipment under extreme working conditions.

[0010] Furthermore, the connecting plate is made of tin-plated copper, which is less likely to generate sparks after contact or collision with the tank wall or wire frame.

[0011] By adopting the above technical solution, the front end connecting plate of the shunt conductor is made of tin-plated copper. Copper has excellent conductivity, ensuring efficient conduction of lightning current and static electricity. The tin plating layer reduces the risk of frictional sparks when the connecting plate comes into contact with the tank wall or conductor frame. Combined with the stop structure, it reduces rigid impact. It is particularly suitable for flammable and explosive environments such as external floating roof tanks that store volatile petroleum products, significantly improving the safety of use.

[0012] Furthermore, the front and rear reels are stamped structures with pleats on their edges to accommodate the diverting wires, and are both fixedly connected to the front and rear coil spring covers by bolts.

[0013] By adopting the above technical solutions, the front and rear reels adopt a stamping structure, which has mature technology and high precision, and can ensure the consistency of reel size. The edge pleated design can neatly store the shunt wires, avoiding the jamming problem caused by loose or overlapping wires in the traditional winding method, making the wire extension and retraction process smoother. The fixed connection between the reel and the coil spring cover plate by bolts enhances the integrity of the reel and the power component, improves the operational stability and reduces assembly errors.

[0014] Furthermore, it also includes a base bracket and a folding handle. The base bracket is a U-shaped integrated sheet metal bending structure, and the folding handle is installed on the base bracket by M bolts and can be folded for storage.

[0015] By adopting the above technical solution, the base bracket adopts a U-shaped integrated sheet metal bending structure, which has stronger overall rigidity and better load-bearing capacity compared with spliced ​​brackets, and can stably support internal components; the folding handle is installed with M5 bolt pairs, and the foldable storage design makes it easy to move during equipment installation or maintenance, and does not occupy extra space when not in use, improving the convenience of operation, especially suitable for narrow working environments such as the top of storage tanks.

[0016] Furthermore, the conductor frame is formed by bending round steel and welding it to a fixing plate, and is fixed to the base bracket by M bolts to support the shunt conductors.

[0017] By adopting the above technical solution, the conductor frame is formed by bending round steel and welding a fixing plate. The structure is simple and has high strength, which can provide stable support for the shunt conductor. It is fixed to the base bracket with M5 bolts, which is stable and easy to disassemble and adjust. The support position can be flexibly optimized according to the conductor's extension and contraction path, effectively avoiding the problems of tangling and wear caused by the conductor sagging or shaking due to its own weight, and ensuring the long-term reliability of the diversion function.

[0018] Furthermore, the nut post has internal threads at both ends, one end is connected to the front coil spring cover plate and the rear coil spring cover plate through an M bolt pair, and the other end is connected to the front coil reel and the rear coil reel.

[0019] By adopting the above technical solution, internal threads are provided at both ends of the nut column. One end is connected to the front and rear coil spring cover plates through an M6 bolt pair, and the other end is connected to the front and rear coil reels. This ensures that the torque of the coil spring can be efficiently transmitted to the coil reels, avoiding power loss. The detachable nature of the threaded connection facilitates the replacement of coil spring or coil reel components during later maintenance, reducing maintenance costs and improving the long-term economic efficiency of the equipment.

[0020] This utility model has the following beneficial effects:

[0021] 1. This utility model uses a design in which two coil springs are installed in parallel on both sides of a fixed shaft and wound in the same direction to achieve stress dispersion and extend the service life of the coil springs. It also eliminates torque peaks and maintains constant force output through torque complementarity. At the same time, the two coil springs serve as backups for each other to form a redundant safety mechanism, ensuring that the lightning protection system can work uninterruptedly.

[0022] 2. This utility model uses an arc-shaped detachable hook design on the surface of the fixed shaft coil spring fixing groove to automatically disengage the fixing hook from the fixed shaft when the coil spring is subjected to reverse torque, preventing the coil spring from breaking due to stress concentration, achieving overload protection and improving safety under extreme working conditions.

[0023] 3. This utility model uses a connecting plate made of tin-plated copper, which utilizes the excellent conductivity of copper to ensure efficient conduction of lightning current and static electricity. At the same time, the tin plating layer reduces the risk of frictional sparks during contact and collision, making it suitable for flammable and explosive environments to improve safety.

[0024] 4. This utility model achieves orderly storage of shunt wires through the stamping and forming structure of the front and rear reels and the edge pleating design, avoiding the jamming problem caused by looseness or overlap in the traditional winding method, and improving the smoothness of wire extension and contraction and the stability of operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the lightning current shunt of this utility model;

[0026] Figure 2 This is a schematic diagram of the lightning current shunt from another perspective of the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the lightning current shunt of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the fixed shaft of the lightning current shunt of this utility model;

[0029] Figure 5 This is a schematic diagram of the coil spring of the lightning current shunt of this utility model;

[0030] Figure 6 This is a schematic diagram of the nut column structure of the lightning current shunt of this utility model.

[0031] The components are: 1-M10 bolt pair; 2-fixing plate; 3-base bracket; 4-M10 bolt pair; 5-folding handle; 6-M5 bolt pair; 7-front coil spring cover plate; 8-M6 bolt pair; 9-wire guide frame; 10-front reel; 11-diverter wire; 12-rear reel; 13-rear coil spring cover plate; 14-fixed shaft; 15-coil spring; 16-nut post. Detailed Implementation

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

[0033] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in this embodiment are only for illustrating the technical solution and do not limit the protection scope of this utility model.

[0034] Reference Figure 1 and Figure 2 As can be seen, in a dual-power lightning current shunt, the assembly of this device uses a fixed shaft 14 as the core load-bearing component, which is made of stainless steel round steel. Symmetrically machined at both ends are spring fixing grooves and limiting hook structures. Two sets of springs 15 are connected to the spring fixing grooves of the fixed shaft 14 through a fixed hook structure, and are placed in parallel on both sides of the fixed shaft 14 and wound in the same direction. The other end of the spring 15 is fixed by a nut post 16. The nut post 16 has internal threads machined at both ends. One end is fastened to the front spring cover plate 7 and the rear spring cover plate 13 through an M6 bolt pair 8, and the other end is rigidly connected to the front reel 10 and the rear reel 12, thereby transmitting the torque of the spring 15 to the reel assembly. The front reel 10 and the rear reel 12 are made using a stamping process, with pleated edges to accommodate the shunt wires 11, and are fixed to the front spring cover plate 7 and the rear spring cover plate 13 respectively by bolts, forming a complete power output unit. One end of the shunt wire 11 is wound and fixed to the rear reel 12, and the other end is fixed by a connecting plate made of tin-plated copper. The connecting plate and the wire frame 9 cooperate to limit the retraction position.

[0035] The base bracket 3, serving as the overall support structure, is formed by U-shaped integrated sheet metal bending. The fixed shaft 14 is horizontally mounted inside the base bracket 3 through limiting structures at both ends. The front coil spring cover plate 7 and the rear coil spring cover plate 13 are fixed to the base bracket 3 with bolts. The folding handle 5 is hinged to both sides of the base bracket 3 via M5 bolt pairs 6, allowing it to be folded for storage to save space. The wire guide frame 9 is formed by bending round steel and welding it to the fixing plate. It is vertically fixed to the front end of the base bracket 3 via M5 bolt pairs 2, providing stable support for the shunt wire 11. The components are modularly assembled through bolt pairs. M5 bolt pairs 2, 6, and 8 correspond to the connection requirements of the wire guide frame, folding handle, and nut post, respectively, ensuring a compact overall structure and convenient assembly and disassembly. The arc-shaped design of the coil spring fixing groove and the limiting hook structure provide a physical basis for overload protection of the coil spring 15 at the assembly level.

[0036] In one embodiment, refer to Figure 3 As can be seen, the internal structure of the lightning current shunt of this device is centered on the fixed shaft 14, which is made of stainless steel round steel and has spring fixing grooves and limit hook structures machined at both ends. Two sets of springs 15 are installed in parallel on both sides of the fixed shaft 14 and wound in the same direction. One end of the spring 15 is connected to the spring fixing groove of the fixed shaft 14 through the fixing hook structure, and the other end is fixed to the nut column 16. The nut column 16 has internal threads at both ends. One end is connected to the front spring cover plate 7 and the rear spring cover plate 13 through the M6 ​​bolt pair 8, and the other end is connected to the front winding reel 10 and the rear winding reel. 12. The front reel 10 and the rear reel 12 are stamped structures with pleated edges to accommodate the diverting wire 11, and are fixed to the front spring cover plate 7 and the rear spring cover plate 13 by bolts. One end of the diverting wire 11 is wound and fixed to the rear reel 12, and the other end is connected to a connecting plate made of tin-plated copper. The connecting plate cooperates with the wire frame 9 to limit the retraction position. The wire frame 9 is formed by bending round steel and welding a fixing plate, and is fixed to the U-shaped integrated sheet metal bending base bracket 3 by M5 bolt pair 2, forming a compact internal power and flow guiding structure.

[0037] In one embodiment, refer to Figure 4 As can be seen, the fixed shaft 14 of the lightning current shunt in this device is integrally machined from stainless steel round steel. As the core load-bearing component, it has symmetrically machined spring fixing grooves and limiting hook structures at both ends. The surface of the spring fixing groove is designed as an arc to adapt to the fixing hook structure of the spring 15. When the spring 15 is subjected to reverse torque, such as excessive stretching of the shunt wire, the fixing hook can disengage from the fixed shaft 14 along the arc surface to prevent the spring 15 from breaking due to stress concentration. The limiting hook structure works in conjunction with the spring fixing groove to ensure the stable connection of the spring 15 under normal working conditions and to provide overload protection under extreme stress. The two sets of springs 15 are placed on both sides of the fixed shaft 14 through the fixing hook structure, in a parallel and unidirectional winding state. The fixed shaft 14 is horizontally mounted inside the base bracket 3 through the limiting structures at both ends, providing rigid support for the entire power assembly and realizing the stable transmission and safety protection of the torque of the spring 15.

[0038] In one embodiment, refer to Figure 5As can be seen, the coil spring structure of the lightning current shunt in this device uses the fixed shaft 14 as the mounting base. The fixed shaft 14 is made of stainless steel round steel, and both ends are machined with arc-shaped coil spring fixing grooves and limit hook structures to connect two sets of coil springs 15. The two sets of coil springs 15 are placed in parallel on both sides of the fixed shaft 14 and wound in the same direction. One end of the coil spring 15 is engaged with the coil spring fixing groove of the fixed shaft 14 through a fixing hook structure. When subjected to reverse torque, the fixing hook can disengage from the fixing groove to prevent breakage. The other end of the coil spring 15 is fixedly connected to the nut column 16. The nut column 16 has internal threads at both ends. One end is fastened to the front coil spring cover plate 7 and the rear coil spring cover plate 13 through M6 bolt pair 8, and the other end is connected to the front winding reel 10 and the rear winding reel 12 to ensure that the torque of the coil spring 15 can be efficiently transmitted to the winding reel to drive the extension and retraction of the shunt wire 11. The overall structure realizes the functions of coil spring stress dispersion, overload protection and stable power output.

[0039] In one embodiment, refer to Figure 6 It can be seen that the nut column 16 of the new lightning current shunt of this device is the core connection and power transmission component. Its structural feature is that both ends are machined with internal threads to form a through threaded connection channel. In use, one end of the nut column 16 is fastened to the front coil spring cover plate 7 and the rear coil spring cover plate 13 via M6 bolt pair 8, integrating and fixing the fixed ends of the two sets of coil springs 15. One end of the coil spring 15 is connected to the coil spring fixing groove of the fixed shaft 14 via a fixed hook structure, and the other end is directly fixed to the outer wall of the nut column 16, so that the torque of the coil spring 15 is concentrated and output through the nut column 16. The other end of the nut column 16 is rigidly connected to the front coil reel 10 and the rear coil reel 12 via threaded engagement. The front coil reel 10 and the rear coil reel 12 are further fixed to the front coil spring cover plate 7 and the rear coil spring cover plate 13 respectively via bolts, ensuring that the torque of the coil spring 15 is efficiently transmitted to the reel assembly, driving the shunt wire 11 to achieve stable extension and retraction. At the same time, the detachable nature of the threaded connection makes it easy to replace the coil spring 15 or the reel component separately during later maintenance, improving assembly flexibility and maintenance convenience.

[0040] Working principle: This device uses a fixed shaft 14 as the core load-bearing component and provides power through the parallel winding of two coil springs 15 in the same direction. The two sets of coil springs 15 are placed on both sides of the fixed shaft 14. One end is connected to the coil spring fixing groove of the fixed shaft 14 through a fixed hook structure, and the other end is rigidly connected to the front and rear reels 10 and 12 through the nut column 16. When the diverting wire 11 is stretched by an external force, the coil spring 15 is twisted to store energy. When it is retracted, it releases elastic potential energy and drives the reel to rotate through the nut column 16. The coil is neatly stored in conjunction with the edge pleats of the reel. The connecting plate and the wire frame 9 restrict the retraction position of the wire to ensure smooth extension and retraction. At the same time, the limiting hook structure of the fixed shaft 14 and the arc surface of the coil spring fixing groove work together. When the wire is overstretched or subjected to reverse torque, the coil spring fixing hook can automatically disengage from the fixed shaft 14 to avoid stress concentration and breakage. This design specifically addresses key issues in the background technology: by dispersing stress through parallel double coil springs, it overcomes the defect of traditional single coil springs being prone to breakage under long-term stress, thus extending service life; the double coil springs wound in the same direction eliminate torque peaks during the extension and contraction process through torque complementarity, and with the coil reel's pleated edge for storing wires, it solves the jamming problem caused by uneven torque of single coil springs; the double coil springs serve as backups for each other, and the fixed shaft limit hook structure forms a redundant safety mechanism, so even if one coil spring fails, the other can still maintain basic recovery function, ensuring uninterrupted operation of the lightning protection system; the arc hook design of the coil spring fixing groove achieves overload protection, avoiding a chain reaction of breakage caused by reverse torque; the copper-plated tin connecting plate ensures efficient lightning current conduction and reduces the risk of sparks during contact and collision, making it suitable for flammable and explosive environments; the overall modular assembly improves structural stability and maintenance convenience, ultimately achieving a powerful, balanced, safe, and reliable lightning current diversion function.

[0041] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A dual-power lightning current shunt, characterized in that, The device includes a fixed shaft (14), two sets of coil springs (15), a front reel (10), a rear reel (12), a diverter wire (11), and a nut post (16). The fixed shaft (14) is made of stainless steel round steel and has coil spring fixing grooves and limiting hook structures at both ends. The two sets of coil springs (15) are installed in parallel on both sides of the fixed shaft (14) and wound in the same direction. One end of the coil spring (15) is connected to the coil spring fixing groove of the fixed shaft (14) through a fixing hook structure, and the other end is fixed to the nut post (16). The front reel (10) and the rear reel (12) are respectively connected to the front coil spring cover plate (7) and the rear coil spring cover plate (13) by bolts. One end of the diverter wire (11) is fixed to the rear reel (12), and the other end is fixed to the connecting plate. The connecting plate cooperates with the wire frame (9) to limit the retraction position of the diverter wire (11).

2. The dual-power lightning current shunt according to claim 1, characterized in that, The surface of the spring fixing groove of the fixed shaft (14) is arc-shaped. When the spring (15) is subjected to reverse torque, the fixing hook disengages from the fixed shaft (14) to prevent breakage.

3. The dual-power lightning current shunt according to claim 1, characterized in that, The connecting plate is made of tin-plated copper, which is not prone to generating sparks after contacting or colliding with the tank wall or the wire frame (9).

4. The dual-power lightning current shunt according to claim 1, characterized in that, The front reel (10) and rear reel (12) are stamped structures with pleated edges to accommodate the diverter wires (11), and are fixedly connected to the front spring cover plate (7) and the rear spring cover plate (13) by bolts.

5. The dual-power lightning current shunt according to claim 1, characterized in that, It also includes a base bracket (3) and a folding handle (5). The base bracket (3) is a U-shaped integrated sheet metal bending structure. The folding handle (5) is installed on the base bracket (3) by M5 bolts (6) and can be folded for storage.

6. The dual-power lightning current shunt according to claim 1, characterized in that, The conductor frame (9) is formed by bending round steel and welding it to the fixing plate. It is fixed to the base bracket (3) by M5 bolt pair (6) and is used to support the shunt conductor (11).

7. The dual-power lightning current shunt according to claim 1, characterized in that, The nut column (16) has internal threads at both ends. One end is connected to the front coil spring cover plate (7) and the rear coil spring cover plate (13) through an M6 bolt pair (8), and the other end is connected to the front coil reel (10) and the rear coil reel (12).

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