Lightning expelling device for corona field

Abstract

The utility model relates to a corona field lightning driving device. Comprising a shell, a middle connecting seat is arranged in the middle of the top of the shell, a plurality of side connecting seats are arranged on the outer side of the middle connecting seat, a plurality of discharge rods with discharge balls at the outer ends are further included, a plurality of discharge needles are arranged on the discharge balls, and the inner end of the discharge rod located in the middle is in threaded connection with the middle connecting seat. The inner end of each discharge rod located at the side part is hinged with each side part connecting seat, and a locking mechanism is arranged between the inner end of each discharge rod and each side part connecting seat; an in-shell insulator is fixedly installed in the shell, a grounding electrode is installed below the in-shell insulator, the upper portion of the grounding electrode is located in the shell, a discharging gap is formed between the grounding electrode and the shell, a grounding cable is connected to the grounding electrode, an out-shell insulator is installed at the lower end of the grounding electrode, and a support is installed at the bottom of the out-shell insulator. The corona field lightning driving device provided by the utility model is high in overall structural strength, and the convenience in transfer, installation and operation is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lightning protection and lightning driving equipment, in particular to a corona field lightning driving device. Background Art

[0002] Corona field lightning repellent devices are used in high-voltage corona field scenarios. These typically include transmission and distribution stations and grids. These grids, due to their extremely high voltages, generate high induced electromotive force (EMF) between them and the ground, making them susceptible to lightning strikes. This is similar to the principle of lightning strikes in nature. To address this issue, lightning repellent devices / lightning repellents are typically installed on transmission towers.

[0003] Existing lightning arresters usually include a shell and a discharge rod mounted on the shell and extending in all directions. A discharge ball head is provided at the end of the discharge rod, and a discharge needle (lightning receptor) is mounted on the discharge ball head. The apparatus also includes a base for fixed connection to a line tower. The lightning arrester of the aforementioned structure has the following problems: First, the multiple discharge rods are fixedly connected or threadedly connected to the shell. When the connection is fixed, the assembly is completed at the factory, and when the connection is threaded, it can be assembled on site. However, the factory-assembled structure makes it inconvenient to transfer the lightning arrester to the application site, and the structure that is assembled on site makes the on-site construction cumbersome; secondly, the overall structural strength of the base is low. In summary, it is necessary to optimize the structure of the corona field lightning arrester to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a corona field lightning drive device with high overall structural strength and improved convenience in transfer and installation operations.

[0005] The technical solution adopted by the utility model is as follows: a corona field lightning drive device comprises a shell, a middle connecting seat is provided in the middle of the top of the shell, a plurality of side connecting seats are provided on the outer side of the middle connecting seat, and a plurality of discharge rods with discharge ball heads at the outer ends, a plurality of discharge needles are provided on the discharge ball heads, the inner end of the discharge rod located in the middle is threadedly connected to the middle connecting seat, the inner end of each discharge rod located on the side is hingedly connected to each side connecting seat and is provided with a locking mechanism; an inner shell insulator is fixedly installed inside the shell, a grounding electrode is installed below the inner shell insulator, the upper part of the grounding electrode is located inside the shell and forms a discharge gap with the shell, a grounding cable is connected to the grounding electrode, an outer shell insulator is installed at the lower end of the grounding electrode, and a support is installed at the bottom of the outer shell insulator.

[0006] Preferably, the middle connecting seat has an internal thread, and the inner end of the discharge rod located in the middle is provided with a threaded end and a limit stop, and the threaded end is screwed into the interior of the middle connecting seat.

[0007] Preferably, a receiving groove is provided on the side connecting seat, and the inner end of the discharge rod located on the side is located in the receiving groove and is hingedly connected with an assembly bolt; the locking mechanism includes a spring and a bayonet, a groove is provided inside the side connecting seat and the spring and the bayonet are located in the groove, and a slot cooperating with the bayonet is also provided at the root of the inner end of the discharge rod.

[0008] Preferably, the outer shell includes an integrally formed hemispherical shell and a straight cylindrical shell, and the insulator inside the shell includes an integrally formed hemispherical body and a straight body, the hemispherical body is located inside the hemispherical shell and is fixedly connected with assembly screws.

[0009] Preferably, threaded holes are provided at the top center and bottom center of the grounding electrode, the straight body of the insulator inside the shell has external threads and is screwed into the top threaded hole of the grounding electrode, and the upper part of the insulator outside the shell has external threads and is screwed into the bottom threaded hole of the grounding electrode.

[0010] Preferably, a flange is provided at the bottom of the external shell insulator, and flanges are provided at the top and bottom of the support. The flange of the external shell insulator and the top flange of the support are fixedly connected by connecting bolts, and a mounting hole and mounting bolts are provided on the bottom flange of the support.

[0011] Preferably, the discharge rod consists of an outer rod segment, an intermediate rod segment and an inner rod segment, threaded portions are provided at both ends of the intermediate rod segment, threaded holes are provided at the inner end of the outer rod segment and the outer end of the inner rod segment, and the intermediate rod segment is threadedly connected to the outer rod segment and the inner rod segment.

[0012] The advantages and positive effects of the utility model are:

[0013] The present invention provides a corona field lightning striker with a rational structural design. Compared with existing lightning strikers used in corona fields, the lightning striker of the present invention has a base portion composed of an inner shell insulator, a grounding electrode, and an outer shell insulator connected in sequence, resulting in a high overall structural strength. The lightning striker of the present invention has discharge rods located on the outside of the device hingedly connected to the side connection seats at their bases and locked with a locking mechanism. Therefore, the discharge rods can be assembled with the main body at the factory. Before being transported to the site, the discharge rods on the sides can be gathered toward the center for easier portability. During on-site installation, the discharge rods only need to be pushed outward until the locking mechanism locks the discharge rods in the extended position, thereby improving the ease of on-site installation. This solves the problem of existing lightning strikers being difficult to transfer after assembly and the problem of cumbersome on-site installation caused by disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0015] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of position A in the middle;

[0016] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of position B in the middle.

[0017] In the picture:

[0018] 1. Discharge needle; 2. Discharge ball head; 3. Discharge rod; 3-1. Outer rod section; 3-2. Middle rod section; 3-3. Inner rod section; 3-4. Limit stop; 3-5. Threaded end; 3-6. Slot; 4. Middle connecting seat; 5. Side connecting seat; 5-1. Accommodating groove; 5-2. Assembly bolt; 5-3. Bayonet; 5-4. Groove; 5-5. Spring; 6. Assembly screw; 7. Discharge gap; 8. Outer shell; 8-1. Hemispherical shell; 8-2. Straight cylindrical shell; 9. Insulator inside the shell; 9-1. Hemispherical body; 9-2. Straight body; 10. Grounding electrode; 11. Grounding cable; 12. Insulator outside the shell; 13. Connecting bolt; 14. Support; 15. Reinforcement rib; 16. Mounting bolt. DETAILED DESCRIPTION

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are given to illustrate in detail.

[0020] See Figure 1 、 Figure 2 and Figure 3 The corona field lightning drive device of the present invention includes a shell 8, a middle connecting seat 4 is provided in the middle of the top of the shell 8, a plurality of side connecting seats 5 are provided on the outside of the middle connecting seat 4, and a plurality of discharge rods 3 with discharge ball heads 2 at the outer ends, and a plurality of discharge needles 1 are provided on the discharge ball heads 2.

[0021] In this embodiment, the discharge rod 3 is composed of an outer rod segment 3-1, an intermediate rod segment 3-2, and an inner rod segment 3-3. Threaded portions are provided at both ends of the intermediate rod segment 3-2. Threaded holes are provided at the inner end of the outer rod segment 3-1 and the outer end of the inner rod segment 3-3. The intermediate rod segment 3-2 is threadedly connected to the outer rod segment 3-1 and the inner rod segment 3-3. This allows the length of the discharge rod 3, and thus the dimensions of the corona field lightning suppression device, to be customized by selecting intermediate rod segments 3-2 of varying lengths.

[0022] The inner end of the discharge rod 3 in the middle is threadedly connected to the middle connecting seat 4, and the inner ends of the discharge rods 3 at the sides are hingedly connected to the side connecting seats 5 and are provided with a locking mechanism.

[0023] like Figure 2As shown in the figure, the middle connecting seat 4 has an internal thread, and the inner end of the discharge rod 3 located in the middle is provided with a threaded end 3-5 and a limit stop 3-4. Specifically, the threaded end 3-5 and the limit stop 3-4 are arranged at the inner end of the inner end rod section 3-3, and the threaded end 3-5 is screwed into the interior of the middle connecting seat 4.

[0024] like Figure 3 As shown in FIG, a receiving groove 5-1 is provided on the side connecting seat 5. The inner end of the discharge rod 3 located on the side is located in the receiving groove 5-1 and is hingedly connected using an assembly bolt 5-2. Specifically, the inner end of the inner end rod segment 3-3 is located in the receiving groove 5-1. The locking mechanism includes a spring 5-5 and a latch 5-3. A groove 5-4 is provided inside the side connecting seat 5, and the spring 5-5 and latch 5-3 are located in the groove 5-4. A latching groove 3-6 is also provided at the inner end root of the discharge rod 3, that is, the inner end root of the inner end rod segment 3-3, to cooperate with the latch 5-3.

[0025] In this way, the discharge rods 3 located on the sides at the time of shipment can be gathered toward the center, reducing the overall gear count of the lightning strike device and making it relatively easy to carry and transfer. During on-site installation, after the main body is fixed, the discharge rods 3 are moved outward until the locking mechanism locks the base of the discharge rod 3 (under the action of the spring 5-5, the tip of the latch 5-3 engages the slot 3-6 at the base of the discharge rod 3). The discharge rods 3 located on the sides are then set to the deployed state. Once locked, they will not automatically unlock, which improves the ease of operation when installing and deploying the corona field lightning strike device.

[0026] An insulator 9 is fixedly installed inside the shell 8, and a grounding electrode 10 is installed below the insulator 9. The upper part of the grounding electrode 10 is located inside the shell 8 and forms a discharge gap 7 with the shell 8. A grounding cable 11 is connected to the grounding electrode 10. An insulator 12 is installed outside the shell at the lower end of the grounding electrode 10, and a support 14 is installed at the bottom of the insulator 12 outside the shell.

[0027] In this embodiment, the outer shell 8 includes an integrally formed hemispherical shell 8-1 and a straight cylindrical shell 8-2, the straight cylindrical shell 8-2 is located below the hemispherical shell 8-1, the middle connecting seat 4 and each side connecting seat 5 are located on the hemispherical shell 8-1, and the insulator 9 inside the shell includes an integrally formed hemispherical body 9-1 and a straight body 9-2, the straight body 9-2 is located below the hemispherical body 9-1, and the hemispherical body 9-1 is located inside the hemispherical shell 8-1 and is fixedly connected with assembly screws 6.

[0028] In this embodiment, threaded holes are provided at the top center and bottom center of the ground electrode 10. The straight body 9-2 of the insulator 9 inside the shell has external threads and is screwed into the top threaded hole of the ground electrode 10. The upper part of the insulator 12 outside the shell has external threads and is screwed into the bottom threaded hole of the ground electrode 10.

[0029] In this embodiment, a flange is provided at the bottom of the external insulator 12, and flanges are provided at both the top and bottom of the support 14. The flange of the external insulator 12 and the top flange of the support 14 are fixedly connected using connecting bolts 13. The bottom flange of the support 14 is provided with mounting holes and mounting bolts 16. Mounting bolts 16 are used to securely connect the lightning repellent device to a bracket in the installation scenario, such as a power transmission line rack. To further enhance structural strength, multiple reinforcing ribs 15 are provided between the lower end of the support 14 and the bottom flange.

Claims

1. A corona field lightning drive device, characterized by: The invention comprises a housing (8), a middle connecting seat (4) is provided in the middle of the top of the housing (8), a plurality of side connecting seats (5) are provided on the outside of the middle connecting seat (4), and a plurality of discharge rods (3) with discharge ball heads (2) at the outer ends, a plurality of discharge needles (1) are provided on the discharge ball heads (2), the inner ends of the discharge rods (3) located in the middle are threadedly connected to the middle connecting seat (4), and the inner ends of the discharge rods (3) located on the sides are hingedly connected to the side connecting seats (5). A locking mechanism is provided; an insulator (9) is fixedly installed inside the shell (8); a grounding electrode (10) is installed below the insulator (9); the upper portion of the grounding electrode (10) is located inside the shell (8) and forms a discharge gap (7) with the shell (8); a grounding cable (11) is connected to the grounding electrode (10); an insulator (12) is installed outside the shell at the lower end of the grounding electrode (10); and a support (14) is installed at the bottom of the insulator (12).

2. The corona field lightning drive device according to claim 1, wherein: The middle connecting seat (4) has an internal thread, and the inner end of the discharge rod (3) located in the middle is provided with a threaded end (3-5) and a limit stop (3-4), and the threaded end (3-5) is screwed into the interior of the middle connecting seat (4).

3. The corona field lightning drive device according to claim 2, wherein: A receiving groove (5-1) is provided on the side connecting seat (5); the inner end of the discharge rod (3) located on the side is located in the receiving groove (5-1) and is hingedly connected using an assembly bolt (5-2); the locking mechanism includes a spring (5-5) and a bayonet (5-3); a groove (5-4) is provided inside the side connecting seat (5), and the spring (5-5) and the bayonet (5-3) are located in the groove (5-4); and a bayonet groove (3-6) that cooperates with the bayonet (5-3) is also provided at the root of the inner end of the discharge rod (3).

4. The corona field lightning drive device according to claim 3, wherein: The outer shell (8) comprises an integrally formed hemispherical shell (8-1) and a straight cylindrical shell (8-2); the insulator (9) in the shell comprises an integrally formed hemispherical body (9-1) and a straight body (9-2); the hemispherical body (9-1) is located inside the hemispherical shell (8-1) and is fixedly connected using assembly screws (6).

5. The corona field lightning drive device according to claim 4, wherein: Threaded holes are provided at the top center and the bottom center of the grounding electrode (10); the straight body (9-2) of the insulator (9) inside the shell has external threads and is screwed into the top threaded hole of the grounding electrode (10); the upper part of the insulator (12) outside the shell has external threads and is screwed into the bottom threaded hole of the grounding electrode (10).

6. The corona field lightning driving device as claimed in claim 5, wherein: A flange is provided at the bottom of the outer shell insulator (12), and flanges are provided at the top and bottom of the support (14). The flange of the outer shell insulator (12) and the top flange of the support (14) are fixedly connected by connecting bolts (13), and a mounting hole and mounting bolts (16) are provided on the bottom flange of the support (14).

7. The corona field lightning drive device according to any one of claims 1 to 6, characterized in that: The discharge rod (3) is composed of an outer rod section (3-1), an intermediate rod section (3-2) and an inner rod section (3-3); threaded portions are provided at both ends of the intermediate rod section (3-2); threaded holes are provided at the inner end of the outer rod section (3-1) and the outer end of the inner rod section (3-3); and the intermediate rod section (3-2) is threadedly connected to the outer rod section (3-1) and the inner rod section (3-3).

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