Lightning protection grounding device for high-voltage direct-current transmission line

Abstract

The utility model relates to the technical field of ground wire rod accessory devices, in particular to a lightning protection grounding device for a high-voltage direct-current power transmission line and a splicable ground wire, so that the depth of the ground wire entering the ground is increased, and the ground wire is lengthened to ensure that lightning can be normally discharged in high-resistance soil areas such as rocks and sandy soil. Therefore, the lightning rod is prevented from causing damage to the high-voltage direct-current power transmission line due to incomplete power release, and the practicability is enhanced. Comprising a first ground wire pipe, a second ground wire pipe, a limiting plate, a connecting rod, a first ground wire rod and a second ground wire rod, the top ends of the first ground wire pipe and the second ground wire pipe are respectively provided with a first connecting inner buckle, the bottom end of the second ground wire pipe is provided with a first connecting outer buckle, and the first connecting outer buckle is in threaded connection with the first connecting inner buckle; the top end of the limiting plate is provided with a line connection assembly and a protection assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding device accessories, in particular to a lightning protection grounding device for a high-voltage direct current transmission line. Background Art

[0002] High Voltage Direct Current (HVDC) technology offers significant advantages in long-distance, high-capacity power transmission, effectively reducing transmission losses and improving the stability and economic efficiency of power systems. However, due to the unique electrical characteristics of HVDC lines, they place higher demands on lightning protection. Lightning strikes are one of the main causes of transmission line failures, not only damaging equipment but also potentially causing widespread power outages, seriously impacting the safe operation of power systems.

[0003] However, in some areas with poor geological conditions, such as rocky, sandy and other high-resistance soil areas, the grounding resistance of traditional grounding devices is high and the length is difficult to control, which makes it impossible to effectively reduce the impulse voltage of lightning current. This increases the risk of equipment damage and further affects the lightning protection effect, resulting in poor practicality. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a splicable ground wire to increase the depth of the ground wire into the ground, and by extending the ground wire, it is ensured that lightning can be discharged normally in high-resistance soil areas such as rocks and sand, thereby preventing the lightning rod from being damaged due to incomplete power release, thereby enhancing the practicality of a high-voltage DC transmission line lightning protection grounding device.

[0005] The utility model discloses a lightning protection grounding device for a high-voltage direct current transmission line, comprising a first grounding pipe, a second grounding pipe, a limiting plate, a connecting rod, a first grounding rod and a second grounding rod, the top ends of the first grounding pipe and the second grounding pipe are respectively provided with a first connecting inner buckle, the bottom end of the second grounding pipe is provided with a first connecting outer buckle, the first connecting outer buckle is threadedly connected to the first connecting inner buckle, the top end of the limiting plate is provided with a line connection component and a protection component, the top end of the limiting plate is provided with a first through hole, the bottom end of the limiting plate is provided with a second connecting inner buckle, the second connecting inner buckle is threadedly connected to the first connecting outer buckle The connecting rod is slidably fitted with the first through hole, the bottom end of the connecting rod is provided with a first threaded hole, the top outer wall of the first grounding rod is provided with a first thread, the first thread is threadedly connected to the first threaded hole, the bottom end of the first grounding rod is provided with a second threaded hole, the top end of the second grounding rod is provided with a screw rod, the first grounding rod and the second grounding rod are respectively inserted into the first grounding tube and the second grounding tube, the screw rod is threadedly connected to the second threaded hole, the bottom end of the second grounding rod is provided with a tip, the top of the connecting rod is provided with a fixed limit assembly, and the bottom of the second grounding rod and the first grounding tube are provided with a disassembly assembly.

[0006] Preferably, the bottom end of the first ground wire tube is provided with an oblique cut.

[0007] Preferably, the fixed limiting assembly includes a mounting plate and a nut, the top of the limiting plate is connected to the mounting plate, a second through hole is provided at the top of the mounting plate, the connecting rod passes through the second through hole, a second thread is provided on the top outer wall of the connecting rod, and the second thread is threadedly connected to the nut.

[0008] Preferably, the line connection assembly includes a T-frame and two sets of protective covers, a third threaded hole is provided at the bottom end of the T-frame, the third threaded hole is threadedly connected to the second threaded hole, a wire winding groove is provided on the left and right outer walls of the T-frame, a wiring groove is provided at the top of the T-frame, the first ground wire is wound around the wire winding groove, and the two sets of protective covers are slidably mounted on the left and right sides of the T-frame.

[0009] Preferably, the disassembly assembly includes a collar, a limiting block is provided on the second ground wire rod, and the inner end of the first ground wire tube is connected to the collar.

[0010] Preferably, the protective assembly includes a tripod and two sets of rubber sleeves. The top of the mounting plate is connected to the tripod, and the tripod is clamped to the two sets of rubber sleeves through a clamping assembly. The top of the tripod is provided with a first wire hole, and the tops of the two sets of rubber sleeves are respectively provided with second wire holes.

[0011] Preferably, the clamping assembly includes twelve groups of clamping blocks, six groups of clamping slots are provided on the outer wall of the tripod, six groups of clamping blocks are respectively provided at the inner ends of the two groups of rubber sleeves, and the twelve groups of clamping slots are respectively clamped with the twelve groups of clamping blocks.

[0012] Preferably, the first ground rod, the second ground rod, the first ground pipe, the second ground pipe, the connecting rod and the T-bracket are made of copper-clad steel, and the limiting plate, the mounting plate and the tripod are made of polyformaldehyde.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: through the splicable design, the ground wire can increase the depth of the ground, ensuring that the grounding resistance can be effectively reduced even in high-resistance soil areas (such as rocks and sand), improving the discharge efficiency of lightning current, and the increased depth of the ground helps to reduce the lightning current impulse voltage and protect the high-voltage DC transmission line from lightning damage. The ground wire can be flexibly adjusted in length by splicing different numbers of second ground wire tubes and first ground wire rods to meet the needs of different geological conditions. This design enables the ground wire to achieve the best lightning protection effect in various complex geographical environments, and adopts a threaded connection method to ensure that the connection between the components is firm and reliable and not easy to loosen. The design of the limit plate, fixed limit assembly and disassembly assembly further enhances the stability of the overall structure and ensures the safety and reliability of the ground wire during use. Secondly, the splicable design makes the installation of the ground wire easier, reduces the time and cost of on-site construction, and can easily disassemble and replace damaged parts during maintenance, reducing the difficulty and cost of maintenance. The design of the protection assembly and the line connection assembly provides additional protection to prevent the ground wire from being affected by the external environment during use, thereby enhancing practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the connection structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the mounting plate and the tripod of the utility model;

[0016] Figure 3 It is a schematic diagram of the enlarged structure of the A part of the utility model;

[0017] Figure 4 It is a schematic diagram of the enlarged structure of the B part of the utility model;

[0018] Figure 5 It is a schematic diagram of the C local enlarged structure of the utility model;

[0019] Figure 6 It is a schematic diagram of the enlarged structure of the D part of the utility model;

[0020] Markings in the accompanying drawings: 1. First grounding tube; 2. Second grounding tube; 3. Limiting plate; 4. Connecting rod; 5. First grounding rod; 6. Second grounding rod; 7. Mounting plate; 8. Nut; 9. T-bracket; 10. Grounding wire; 11. Protective cover; 12. Limiting block; 13. Ring; 14. Tripod; 15. Rubber sleeve; 16. Clamping block. DETAILED DESCRIPTION

[0021] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figures 1 to 6 As shown, a lightning protection grounding device for a high-voltage direct current transmission line of the present invention comprises a first grounding pipe 1, a second grounding pipe 2, a limiting plate 3, a connecting rod 4, a first grounding rod 5 and a second grounding rod 6. The tops of the first grounding pipe 1 and the second grounding pipe 2 are respectively provided with a first connecting inner buckle, the bottom end of the second grounding pipe 2 is provided with a first connecting outer buckle, the first connecting outer buckle is threadedly connected to the first connecting inner buckle, the top of the limiting plate 3 is provided with a line connection component and a protection component, the top of the limiting plate 3 is provided with a first through hole, the bottom end of the limiting plate 3 is provided with a second connecting inner buckle, the second connecting inner buckle is threadedly connected to the first The connection is threaded externally, the connecting rod 4 is slidably fitted with the first through hole, the bottom end of the connecting rod 4 is a first threaded hole, the top outer wall of the first grounding rod 5 is provided with a first thread, the first thread is threadedly connected to the first threaded hole, the bottom end of the first grounding rod 5 is provided with a second threaded hole, the top end of the second grounding rod 6 is provided with a screw rod, the first grounding rod 5 and the second grounding rod 6 are respectively inserted into the first grounding tube 1 and the second grounding tube 2, the screw rod is threadedly connected to the second threaded hole, the bottom end of the second grounding rod 6 is provided with a tip, the top of the connecting rod 4 is provided with a fixed limit assembly, the second grounding rod 6 and the first grounding tube 1 A disassembly component is provided at the bottom; the utility model uses a splicable design to increase the depth of the ground wire into the ground, ensuring that the grounding resistance can be effectively reduced even in high-resistance soil areas (such as rocks and sand), improving the discharge efficiency of lightning current, and the increased depth into the ground helps to reduce the lightning current impulse voltage and protect the high-voltage DC transmission line from lightning damage. The ground wire can be flexibly adjusted in length by splicing different numbers of second ground wire tubes and first ground wire rods to meet the needs of different geological conditions. This design enables the ground wire to achieve the best lightning protection effect in various complex geographical environments, and adopts a threaded connection method to ensure that the connection between the components is firm and reliable and not easy to loosen. The design of the limit plate, fixed limit assembly and disassembly assembly further enhances the stability of the overall structure and ensures the safety and reliability of the ground wire during use. Secondly, the splicable design makes the installation of the ground wire easier, reduces the time and cost of on-site construction, and can easily disassemble and replace damaged parts during maintenance, reducing the difficulty and cost of maintenance. The design of the protection assembly and the line connection assembly provides additional protection to prevent the ground wire from being affected by the external environment during use, thereby enhancing practicality.

[0023] As a preference of the above embodiment, the bottom end of the first grounding tube 1 is provided with an oblique cut; the oblique cut can facilitate the installation of the first grounding tube and the second grounding tube, thereby enhancing practicality.

[0024] As a preferred embodiment of the above embodiment, the fixed limiting assembly includes a mounting plate 7 and a nut 8. The top of the limiting plate 3 is connected to the mounting plate 7. The top of the mounting plate 7 is provided with a second through hole. The connecting rod 4 passes through the second through hole. A second thread is provided on the top outer wall of the connecting rod 4, and the second thread is threadedly connected to the nut 8. The mounting plate and the nut can be used to reinforce the connecting rod and limit the connecting rod, the first ground rod and the second ground rod, thereby enhancing practicality.

[0025] As a preferred embodiment of the above, the line connection assembly includes a T-frame 9 and two sets of protective covers 11. The bottom end of the T-frame 9 is provided with a third threaded hole, and the third threaded hole is threadedly connected to the second thread. The left and right outer walls of the T-frame 9 are provided with wire winding grooves, and the top of the T-frame 9 is provided with a wiring groove. The grounding wire 10 is wound on the wire winding groove, and the two sets of protective covers 11 are slidably mounted on the left and right sides of the T-frame 9; the T-frame can be threadedly connected to the connecting rod through the second thread and the third threaded hole, and then the grounding wire is wound through the two sets of wire winding grooves, and then the two sets of protective covers are conveniently mounted on the left and right sides of the T-frame, thereby enhancing practicality.

[0026] As a preferred embodiment of the above embodiment, the disassembly assembly includes a ring 13, a limiting block 12 is provided on the second ground rod 6, and the inner end of the first ground tube 1 is connected to the ring 13; the limiting block on the second ground rod can be driven to hit the ring by pulling the connecting rod upward, so that the first ground tube and the second ground tube can be pulled out through multiple impacts, thereby facilitating maintenance and repair of the equipment, thereby enhancing practicality.

[0027] As a preferred embodiment of the above, the protective component includes a tripod 14 and two sets of rubber sleeves 15. The top of the mounting plate 7 is connected to the tripod 14. The tripod 14 is clamped to the two sets of rubber sleeves 15 through a clamping component. The top of the tripod 14 is provided with a first wire hole, and the tops of the two sets of rubber sleeves 15 are respectively provided with second wire holes. The tripod and the two sets of rubber sleeves can prevent high voltage electricity from accidentally injuring workers and prevent workers from accidentally touching the T-shaped frame, thereby enhancing practicality.

[0028] As a preferred embodiment of the above, the clamping assembly includes twelve groups of clamping blocks 16, six groups of clamping grooves are provided on the outer wall of the tripod 14, and six groups of clamping blocks 16 are provided at the inner ends of the two groups of rubber sleeves 15 respectively, and the twelve groups of clamping grooves are clamped with the twelve groups of clamping blocks 16 respectively; the two groups of rubber sleeves can be clamped together through the twelve groups of clamping grooves and the twelve groups of clamping blocks, thereby strengthening the clamping between the two groups of rubber sleeves and the tripod, thereby enhancing practicality.

[0029] As a preferred embodiment of the above embodiment, the first ground rod 5, the second ground rod 6, the first ground pipe 1, the second ground pipe 2, the connecting rod 4 and the T-bracket 9 are made of copper-clad steel, and the limit plate 3, the mounting plate 7 and the tripod 14 are made of polyformaldehyde; the copper-clad steel material has good conductivity, wear resistance and a long service life, and the polyformaldehyde has good wear resistance, corrosion resistance and high hardness, and it is an insulating material, thereby enhancing the overall service life of the equipment and thus enhancing practicality.

[0030] The utility model discloses a lightning protection grounding device for a high-voltage direct current transmission line. The working principle of the device is as follows: when working, firstly, an installation site is selected, then a hole is drilled, then the depth of the drilled hole is measured, and the number of first grounding rods and second grounding tubes is rotated according to the depth, then an appropriate number of first grounding rods are connected to the second grounding rods, then an appropriate number of second grounding tubes are connected to the first grounding tube, then the first grounding rod and the second grounding tube are respectively inserted into the first grounding tube and the second grounding tube, then the first grounding rod is threadedly connected to the connecting rod, and then The first grounding tube and the second grounding tube are inserted into the drilled hole, and then the T-frame is installed. Then the grounding wire is wrapped around the T-frame, and then the grounding wire is connected to the upper device. Then the two sets of rubber sleeves are clamped and fixed to the tripod through twelve sets of clamping blocks and twelve sets of clamping slots. Then they can be used normally. When the first grounding tube and the second grounding tube need to be maintained and repaired, the T-frame is pulled upward multiple times, and then the limit block hits the ring multiple times to pull the first grounding tube and the second grounding tube outward, and then maintenance and repair can be carried out.

[0031] The terms "vertical," "horizontal," "left," "right," and the like are used herein for descriptive purposes only.

[0032] The "first", "second" and "third" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lightning protection grounding device for a high voltage direct current transmission line, characterized in that: The invention comprises a first ground wire tube (1), a second ground wire tube (2), a limiting plate (3), a connecting rod (4), a first ground wire rod (5) and a second ground wire rod (6), wherein the top ends of the first ground wire tube (1) and the second ground wire tube (2) are respectively provided with a first connecting inner buckle, the bottom end of the second ground wire tube (2) is provided with a first connecting outer buckle, the first connecting outer buckle is threadedly connected to the first connecting inner buckle, the top end of the limiting plate (3) is provided with a line connection component and a protection component, the top end of the limiting plate (3) is provided with a first through hole, the bottom end of the limiting plate (3) is provided with a second connecting inner buckle, the second connecting inner buckle is threadedly connected to the first connecting outer buckle, the connecting rod (4) is connected to the first through hole, and the connecting rod (5) is connected to the first through hole. The hole sliding set comprises a first threaded hole at the bottom end of the connecting rod (4), a first thread is provided on the top outer wall of the first grounding rod (5), the first thread is threadedly connected to the first threaded hole, a second threaded hole is provided at the bottom end of the first grounding rod (5), a screw rod is provided at the top end of the second grounding rod (6), the first grounding rod (5) and the second grounding rod (6) are respectively inserted into the first grounding tube (1) and the second grounding tube (2), the screw rod is threadedly connected to the second threaded hole, a tip is provided at the bottom end of the second grounding rod (6), a fixed limit assembly is provided at the top of the connecting rod (4), and a disassembly assembly is provided at the bottom of the second grounding rod (6) and the first grounding tube (1).

2. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 1, characterized in that: The bottom end of the first ground wire tube (1) is provided with an oblique cut.

3. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 2, characterized in that: The fixed limiting assembly includes a mounting plate (7) and a nut (8). The top end of the limiting plate (3) is connected to the mounting plate (7). The top end of the mounting plate (7) is provided with a second through hole. The connecting rod (4) passes through the second through hole. A second thread is provided on the top outer wall of the connecting rod (4). The second thread is threadedly connected to the nut (8).

4. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 3, characterized in that: The line connection assembly comprises a T-shaped frame (9) and two sets of protective sleeves (11). The bottom end of the T-shaped frame (9) is provided with a third threaded hole, the third threaded hole is threadedly connected to the second threaded hole, a wire winding groove is provided on the left and right outer walls of the T-shaped frame (9), a wiring groove is provided on the top end of the T-shaped frame (9), a grounding wire (10) is wound on the wire winding groove, and the two sets of protective sleeves (11) are slidably sleeved on the left and right sides of the T-shaped frame (9).

5. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 4, characterized in that: The disassembly assembly comprises a collar (13), a limiting block (12) is provided on the second ground wire rod (6), and the inner end of the first ground wire tube (1) is connected to the collar (13).

6. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 5, characterized in that: The protection assembly comprises a tripod (14) and two groups of rubber sleeves (15). The top of the mounting plate (7) is connected to the tripod (14). The tripod (14) is clamped with the two groups of rubber sleeves (15) through a clamping assembly. The top of the tripod (14) is provided with a first wire hole, and the tops of the two groups of rubber sleeves (15) are respectively provided with a second wire hole.

7. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 6, characterized in that: The card assembly comprises twelve groups of card blocks (16), six groups of card slots are provided on the outer wall of the tripod (14), six groups of card blocks (16) are provided at the inner ends of the two groups of rubber sleeves (15), and the twelve groups of card slots are card-assembled with the twelve groups of card blocks (16).

8. A lightning protection grounding device for a high-voltage direct current transmission line according to claim 7, characterized in that: The first grounding rod (5), the second grounding rod (6), the first grounding tube (1), the second grounding tube (2), the connecting rod (4) and the T-shaped frame (9) are made of copper-clad steel, and the limiting plate (3), the mounting plate (7) and the tripod (14) are made of polyformaldehyde.

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