CN108257744A - Overhead insulated conductor lightning protection strikes off line apparatus - Google Patents

Abstract

The invention discloses a kind of overhead insulated conductor lightning protections to strike off line apparatus, including cross-arm, insulator and insulated conductor, the insulator is set on cross-arm, the insulated conductor is set on insulator, it is set on the insulated conductor there are two penetration type connection gold utensil, the penetration type connection gold utensil, which is respectively arranged on insulated conductor, is located at insulator both sides；Parallel connection bare conductor on insulated conductor, bare conductor both ends are connected in parallel to by being connect with the conductor coupling portion of penetration type connection gold utensil on insulated conductor respectively.The device utilizes two connection gold utensils by a conductor in parallel to the insulated conductor both ends centered on insulator, improvement cost is extremely low, it is easy to implement, anti-lightning strike broken string significant effect, it is easy for installation convenient for promotion and implementation, simultaneously using sealing structure, insulated conductor is avoided to intake, anticorrosion, service life is longer.

Description

Lightning breakage protection device for overhead insulated wires

technical field

The invention relates to the technical field of anti-lightning disconnection protection for overhead insulated transmission lines of power system distribution networks, in particular to an anti-lightning disconnection device for overhead insulated wires.

Background technique

Distribution lines are mainly responsible for the distribution of electric energy and are an important part of the power system. Distribution lines are directly connected with power users, and their safety and reliability directly affect the power quality and reliability of power users. With the development of society and the increasing dependence of power users on power, the reliability and importance of distribution lines Sex is getting more and more attention. Distribution network lines are mainly divided into overhead lines, overhead insulated wire lines and cable lines. Overhead insulated wire lines have the advantages of safety, reliability, economy, and convenient construction and maintenance. They are widely used in distribution network lines. At present, urban 10kV distribution network lines have been Insulation is gradually realized.

Operation experience and research results show that: for overhead insulated conductor distribution network lines, when lightning overvoltage causes insulator flashover and breaks down the conductor insulation layer, the punctured conductor insulation layer is pinhole-shaped, and the power frequency freewheeling arc is affected by the surrounding insulation. The barrier, the arc cannot move on the overhead insulated wire, the arc root can only burn at the pinhole, and the overhead insulated wire will be blown in a very short time, and a lightning strike disconnection fault occurs, and the fault generally occurs at a distance from the line On the overhead insulated wire within the range of about 0-300mm near the post insulator.

At present, the main lightning protection and disconnection measures for overhead insulated lines at home and abroad mainly include adding overhead lightning protection lines, installing zinc oxide arresters, improving line insulation levels, using clamp insulators, adding current-limiting arc suppression angles, and increasing line overvoltages. Protectors and other technical measures, but these methods of lightning protection and disconnection have disadvantages such as difficult construction, high cost of new construction or renovation, which limit their application on overhead insulated lines of distribution networks.

Contents of the invention

Aiming at the above disadvantages, the present invention provides an overhead insulated wire anti-lightning breakage device with simple construction.

In order to solve the above problems, the present invention adopts the following technical solutions: an overhead insulated wire lightning protection disconnection device, including a cross arm, an insulator and an insulated wire, the insulator is arranged on the cross arm, and the insulated wire is arranged on the insulator , the insulated wire is provided with two puncture-type connecting fittings, and the puncturing-type connecting fittings are respectively arranged on the insulated wire and located on both sides of the insulator; The junction of the insulated wire has a conductor piercing part that can pierce the insulation layer of the insulated wire and is electrically connected with the conductor part of the insulated wire. Connect with the conductor connection part of the piercing type connection fitting and connect it to the insulated wire in parallel.

As a further improvement of this technical solution, the puncture-type connection fittings include a cavity formed by the upper insulating layer and the lower insulating layer. The upper insulating layer on the top of the cavity is provided with an upper wire pressing plate, and the upper conducting wire pressing plate is away from the upper insulating layer. The first arc-shaped wire channel and the first arc-shaped insulated wire channel are respectively provided on the side, and the lower wire pressing plate is arranged on the lower insulating layer at the bottom of the cavity, and the side of the lower conducting wire pressing plate facing away from the lower insulating layer is respectively provided with a matching first The arc-shaped wire channel is used as the second arc-shaped wire channel of the bare wire connection channel and the second arc-shaped insulated wire channel that cooperates with the first arc-shaped insulated wire channel as the insulated wire connection channel; the bare wire connection channel forms Conductor connection part, the inner wall of the insulated wire connection channel is provided with several puncture needles to form the conductor puncture part, the upper wire pressing plate and the lower wire pressing plate are conductors, and the upper insulating layer and the lower insulating layer are connected and fixed by connectors.

As a further improvement of the technical solution, a first soft sealing part and a second soft sealing part are respectively provided at the junctions between the two sides of the upper insulating layer and the lower insulating layer.

As a further improvement of the technical solution, the upper insulating layer and the lower insulating layer are fixed by bolts and nuts.

As a further improvement of the technical solution, a first washer and a second washer for reinforcement are respectively provided between the nut and the lower insulating layer and between the nut and the upper insulating layer.

As a further improvement of the technical solution, the nut is a torque nut.

As a further improvement of the technical solution, the length of the bare wire is 1000 mm.

As a further improvement of the technical solution, the bare wire is parallel to the insulated wire.

As a further improvement of the technical solution, the puncture-type connecting fittings are located on the insulated wires at a distance of 400 mm from the connection between the insulated wires and the insulator.

Beneficial effects: the device uses two connecting fittings to connect a wire in parallel to both ends of the insulated wire centered on the insulator, without changing the original overhead insulated wire distribution network line structure, and only needs to add two puncture-type connecting fittings and a The cost of transformation is very low, the implementation is convenient, the effect of lightning protection against disconnection is remarkable, it is easy to popularize and implement, and has great economic benefits; the device is a puncture structure, which does not need to strip the original insulated wire, and has no damage to the original insulated wire. It is easy to install, and at the same time adopts a sealed structure to prevent water from entering the insulated wire, prevents corrosion, and has a longer service life.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Figure 2 is a side view of the puncture-type connecting fitting.

Detailed ways

In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 and 2, an overhead insulated wire lightning protection disconnection device includes a cross arm 1, an insulator 2 and an insulated wire 3, the insulator 2 is arranged on the cross arm 1, and the insulated wire 3 is set On the insulator 2, two puncture-type connection fittings 5 are arranged on the insulated wire 3, and the puncture-type connection fittings 5 are respectively arranged on the insulated wire 5 and located on both sides of the insulator 2; the puncture-type connection fittings 5 have conductor connection part, and the connection between the puncture-type connecting hardware 5 and the insulated wire 3 has a conductor piercing part that can pierce the insulation layer of the insulated wire 3 and electrically connect with the conductor part of the insulated wire 3, and the conductor connection part and the conductor piercing part are electrically connected The bare wire 4 is connected in parallel on the insulated wire 3, and the two ends of the bare wire 4 are respectively connected to the insulated wire 3 in parallel by connecting with the conductor connection part of the piercing type connection fitting 5.

The puncture-type connection fitting 5 includes a cavity formed by the cooperation of the upper insulating layer 18 and the lower insulating layer 10. The upper insulating layer 18 is located on the top of the cavity and is provided with an upper wire pressing plate 17. The upper wire pressing plate 17 faces away from the side of the upper insulating layer 18. The first arc-shaped wire channel and the first arc-shaped insulated wire channel are respectively provided. A lower wire pressing plate 13 is provided on the lower insulating layer 10 at the bottom of the cavity. Cooperate with the first arc-shaped wire channel as the second arc-shaped wire channel of the bare wire connection channel and cooperate with the first arc-shaped insulated wire channel as the second arc-shaped insulated wire channel of the insulated wire connection channel; the bare wire The connection channel forms a conductor connection part, and the inner wall of the insulated wire connection channel is provided with several puncture needles 16 to form a conductor puncture part. The upper wire pressing plate 17 and the lower wire pressing plate 13 are conductors. Connected and fixed by connectors.

A first soft seal 9 and a second soft seal 15 are respectively provided at the junctions between the two sides of the upper insulating layer 18 and the lower insulating layer 10 .

The upper insulating layer and the lower insulating layer are fixed by bolts 11 and nuts 19 .

Between the nut and the lower insulation layer 10 and between the nut 19 and the upper insulation layer 18 are respectively provided a first washer 12 and a second washer 20 for reinforcement.

The nut 19 is a torque nut.

The length of the bare wire 4 is 1000mm.

The bare wire 4 is parallel to the insulated wire 3 .

The puncture-type connecting hardware is located on the insulated wire 3 and is 400mm away from the connection between the insulated wire 3 and the insulator 2 respectively.

With the insulator as the support, fix the original insulated wire on the insulator, and install the puncture-type connecting fittings on the insulated wire, respectively, at a position 400mm away from the connection between the insulated wire and the insulator on both sides. In the connection hole formed by the cooperation of the first arc-shaped wire channel and the second arc-shaped wire channel of the type connecting fittings, the upper insulating layer and the lower insulating layer of the two puncture-type connecting fittings are respectively fixed by bolts and nuts, so that The bare wires are reliably connected to the insulated wires, and the parallel bare wires are ensured to be as parallel as possible to the original insulated wires, so as to avoid the partial leakage distance of the bare wires bridging the insulator.

The length of the parallel bare wires is 1000mm. When the lightning overvoltage causes the insulator to flashover, it can effectively avoid the breakdown of the insulated wires in the range of about 0-500mm near the insulator, and the parallel bare wires form a discharge path with the air gap near the insulator. In the short-circuit arc generated by power-frequency continuous current, the arc root continuously slides along the surface of the parallel bare wire under the action of electromagnetic force, and will not concentrate on a certain point on the insulated wire for burning, so it will not burn the insulated wire and avoid the damage of the insulated wire. The occurrence of lightning strike disconnection.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (9)

1. An overhead insulated wire lightning protection disconnection device, comprising a cross arm (1), an insulator (2) and an insulated wire (3), and the insulator (2) is located on the cross arm (1), and is characterized in that : the insulated wire (3) is arranged on the insulator (2), the insulated wire (3) is provided with two puncture type connection fittings (5), and the puncture type connection fittings (5) are respectively arranged on the insulated wire (5) is located on both sides of the insulator (2); the puncture-type connecting fitting (5) has a conductor connection part, and the connection between the puncturing-type connecting fitting (5) and the insulated wire (3) has a structure capable of piercing the insulated wire (3 ) insulation layer and a conductor piercing part electrically connected to the conductor part of the insulated wire (3), the conductor connecting part is electrically connected to the conductor piercing part; the bare wire (4) is connected in parallel on the insulated wire (3), and the bare wire (4) The two ends are respectively connected in parallel to the insulated wire (3) by connecting with the conductor connection part of the piercing type connection fitting (5). 2. The lightning protection disconnection device for overhead insulated wires according to claim 1, characterized in that: the puncture-type connection fitting (5) includes a cavity formed by the cooperation of the upper insulating layer (18) and the lower insulating layer (10) The upper insulating layer (18) on the top of the cavity is provided with an upper wire pressing plate (17), and the upper wire pressing plate (17) is respectively provided with a first arc-shaped wire passage and a first The arc-shaped insulated wire channel is located on the lower insulating layer (10) at the bottom of the cavity and is provided with a lower wire pressing plate (13). Shaped wire channel as the second arc-shaped wire channel of the bare wire connection channel and cooperates with the first arc-shaped insulated wire channel as the second arc-shaped insulated wire channel of the insulated wire connection channel; the bare wire connection channel forms a conductor connection part, the inner wall of the insulated wire connection channel is provided with several puncture needles (16) in the circumferential direction to form a conductor puncture part, the upper wire pressing plate (17) and the lower wire pressing plate (13) are conductors, and the upper insulating layer (18) and the lower wire pressing plate (13) are conductors. The insulating layer (10) is connected and fixed through the connecting piece. 3. The lightning breakage protection device for overhead insulated wires according to claim 2, characterized in that: first soft seals are respectively provided at the junctions between the two sides of the upper insulating layer (18) and the lower insulating layer (10) (9) and a second soft body seal (15). 4. The lightning protection disconnection device for overhead insulated wires according to claim 2, characterized in that: the upper insulating layer and the lower insulating layer are fixed by bolts (11) and nuts (19). 5. The lightning protection disconnection device for overhead insulated wires according to claim 4, characterized in that it is located between the nut and the lower insulating layer (10) and between the nut (19) and the upper insulating layer (18) A first washer (12) and a second washer (20) are respectively provided for reinforcement. 6. The lightning protection disconnection device for overhead insulated wires according to claim 4, characterized in that: the nut (19) is a torque nut. 7. The lightning protection disconnection device for overhead insulated wires according to claim 1, characterized in that: the length of the bare wire (4) is 1000 mm. 8. The lightning protection device for disconnection of overhead insulated wires according to claim 1, characterized in that: the bare wires (4) are parallel to the insulated wires (3). 9. The lightning protection disconnection device for overhead insulated wires as claimed in claim 1, characterized in that: the puncture-type connecting fittings are located on the insulated wires (3) respectively at a distance from the connection between the insulated wires (3) and the insulators (2). 400mm each.