CN201466619U - A gap lightning protection device - Google Patents

Abstract

The utility model discloses a gap lightning protection protection device, which belongs to the technical field of lightning protection for transmission lines of electric power systems. Including the arc-resistant insulator, the high-voltage end of the arc-resistant insulator is connected to the overhead insulated wire, the grounding end of the arc-resistant insulator is connected to an insulator, and the insulator is respectively equipped with an arc-starting metal rod and a grounding metal rod with an arc-starting distance A, and the grounding metal rod It is connected to the grounding end of the arc-resistant insulator, the arc-starting metal rod is connected to one end of the arc-starting insulated flexible conductor, and the other end of the arc-starting insulated flexible conductor is surface-to-face connected to the conductor core of the overhead insulated conductor. The utility model introduces the strong current at the moment of lightning strike into the earth, and prevents the overhead insulated wire from being broken by lightning. One end of the arc-starting insulated flexible wire is connected to the conductor core of the overhead insulated wire by surface contact. Compared with the line contact in the prior art, the surface contact connection is more reliable, not easy to be damaged when struck by lightning, and safer to use.

Description

A gap lightning protection device

technical field

The utility model belongs to the technical field of lightning protection for electric power system transmission lines, and in particular relates to a lightning protection device.

Background technique

Most of the power distribution overhead lines in the power system use insulated overhead insulated wires. The lightning protection of overhead lines has always been a topic that power workers have been working hard to explore. In recent years, the faults caused by lightning still account for a large proportion in the power grid, including damage to insulators and fittings caused by power-frequency freewheeling after lightning flashover, leading to line accidents. Lightning faults are still one of the important factors affecting the safety of the power grid. The lightning protection measures for overhead lines in the early years were to improve the lightning resistance level of the line and reduce the lightning tripping rate, such as erecting lightning protection lines and strengthening insulation, etc. However, with the rapid development of my country's power grid in recent years, the above lightning protection protection methods are only to improve the lightning resistance level. The large current of lightning strike still exists, which has become conservative and costly. In recent years, new lightning protection measures and devices have emerged. As described in the utility model with the announcement number "CN201146358Y" and the name "Gap Lightning Protection Device", an insulator is connected to the ground end of the arc-resistant insulator, and the insulator There are arc-starting metal rods and grounding arc-starting metal rods, the grounding arc-starting metal rods are connected to the grounding end of the arc-resistant insulator, and the arc-starting insulated flexible wires installed on the piercing clamp are connected to the arc-starting metal rods, so when lightning strikes , can transfer the lightning arc energy from the overhead insulated wire in a very short period of time through the puncture wire clip and the arc-strike insulated flexible wire to the arc-strike metal rod. Earth, so as to protect overhead insulated conductors and arc-resistant insulators from damage. However, the puncture clamp of the lightning protection device is connected to the overhead insulated wire by line contact, and its contact area is small, and the lightning strike time is very short, and the instantaneous current is very large, which easily causes damage to the contact point between the puncture clamp and the overhead insulated wire, affecting The lightning protection effect of the device.

Utility model content

The utility model aims to solve the problems of high cost and easy damage of the existing overhead line lightning protection device, and provides a gap lightning protection device with low cost and long service life.

The utility model is realized by following method:

A gap lightning protection device, comprising an arc-resistant insulator, the high-voltage end of the arc-resistant insulator is connected to an overhead insulated wire, the grounding end of the arc-resistant insulator is connected to an insulator, and the insulators are respectively equipped with arc-starting metal rods with an arc-starting distance A and the grounding metal rod, the grounding metal rod is connected to the grounding end of the arc-resistant insulator, the arc-starting metal rod is connected to one end of the arc-starting insulated flexible conductor, and the other end of the arc-starting insulated flexible conductor is surface-to-face connected to the conductor core of the overhead insulated conductor.

The surface contact connection is that a tile-shaped clamp matching the overhead insulated wire is provided at one end of the arc-starting insulated flexible wire, and the tile-shaped clamp is surface-contact connected with the conductor core of the overhead insulated wire.

The surface contact connection is that a sleeve covering the conductor core of the overhead insulated wire is arranged at one end of the arc starting insulated flexible wire, and the sleeve is connected with the conductor core of the overhead insulated wire by surface contact.

The utility model introduces the strong current at the moment of lightning strike into the earth, prevents the lightning from breaking the overhead insulated wire, and has low cost. One end of the arc-starting insulated flexible wire is connected to the conductor core of the overhead insulated wire by surface contact. Compared with the line contact in the prior art, the surface contact connection is more reliable, not easy to be damaged when struck by lightning, and safer to use.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Figure 2 is a partially enlarged schematic diagram of A-A in Figure 1;

Fig. 3 is the structural representation of the utility model embodiment 2;

Fig. 4 is a partially enlarged schematic diagram of B-B in Fig. 2 .

Detailed ways

Example 1

As shown in Figure 1, the utility model includes an arc-resistant insulator 3, the high-voltage end of the arc-resistant insulator 3 is connected to the overhead insulated wire 1, the grounding end of the arc-resistant insulator 3 is connected to an insulator 7, and the insulator 7 is respectively equipped with a The arc-starting metal rod 4 and the grounding metal rod 5 at a distance A, the grounding metal rod 5 is connected to the grounding end of the arc-resistant insulator 3, the arc-starting metal rod 4 is connected to one end of the arc-starting insulated wire 6, and the other end of the arc-starting insulated wire 6 The connection with the overhead insulated conductor 1 is surface contact. Said surface contact connection is provided at one end of the arc starting insulated wire 6 with a tile-shaped clamp 2 matched with the overhead insulated wire 1 .

As shown in FIG. 2 , the tile-shaped clamp 2 is composed of an insulating layer 11 and a conductor layer 12 , and the overhead insulated wire 1 is composed of a conductor core 9 and an insulating layer 10 . The conductor core 1 at the contact position of the overhead insulated wire 1 and the tile-shaped clamp 2 is exposed, and is in contact with the protruding conductor layer 12 of the tile-shaped clamp 2 .

The working process of the utility model is as follows: when the overhead insulated wire 1 is struck by lightning, the lightning strike overvoltage passes through the overhead insulated wire 1, the tile-shaped wire clamp 2 and the arc-starting insulated flexible wire 2 to the arc-starting metal rod 4, and the overhead insulated wire 1 The lightning strike overvoltage on the ground breaks down the arc striking distance A to cause an arc, so that the freewheeling power frequency arc is transferred to the arc striking metal rod 4 for burning, and is introduced into the earth through the grounding end of the arc-resistant insulator 3, and the lightning strike arc is transmitted from the overhead insulated wire 1 Up transfer, so as to protect the overhead insulated conductors from damage.

Example 2

As shown in Fig. 3 and Fig. 4, the surface contact connection is that a pipe sleeve 8 covering the conductor core 9 of the overhead insulated wire 1 is arranged at one end of the arc striking insulated flexible wire 6, and the pipe sleeve 8 and the conductor core of the overhead insulated wire 1 9 is a surface contact connection. The sleeve 8 consists of a conductor layer 12 and an insulating layer 11 . At the position where the overhead insulated wire 1 is in contact with the sleeve 8 , the conductor core 9 is exposed and contacts the conductor layer 12 on the inner surface of the sleeve 8 . Others are with embodiment 1.

Claims (3)

1. clearance lightning-proof protective device; comprise arc resistance insulation (3); the high-pressure side of arc resistance insulation (3) is connected with suspended insulated guide wire (1); the earth terminal of arc resistance insulation (3) is connected with insulator (7); striking metal bar (4) and grounded metal rod (5) with striking spacing A are housed respectively on the insulator (7); grounded metal rod (5) is connected with the earth terminal of arc resistance insulation (3); striking metal bar (4) connects an end of striking insulating soft wire (6), it is characterized in that: the other end of striking insulating soft wire (6) is that the face contact is connected with the conductor cores (9) of suspended insulated guide wire (1).

2. clearance lightning-proof protective device according to claim 1; it is characterized in that: it is watt shape wire clamp (2) that the end setting at striking insulating soft wire (6) matches with suspended insulated guide wire (1) that described contact connects, and watt shape wire clamp (2) and the conductor cores (9) of suspended insulated guide wire (1) are that face contacts and is connected.

3. clearance lightning-proof protective device according to claim 1; it is characterized in that: it is the pipe box (8) that the conductor cores (9) that coats suspended insulated guide wire (1) is set at striking insulating soft wire (6) one ends that described contact connects, and pipe box (8) is that the face contact is connected with the conductor cores (9) of suspended insulated guide wire (1).

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