CN106298106B - A kind of lightning protection line insulator with pressure and discharging gap function - Google Patents

Abstract

The invention discloses a lightning protection line insulator with voltage equalization and discharge gap functions, which comprises an insulator body, a voltage equalization ring, an arc strike rod, a base and a discharge ball, wherein the voltage equalization ring is sheathed On the insulating cap of the insulator body, the arc strike rod is arranged on one side of the bottom of the insulator body, and the bottom of the insulator body is fixedly connected to the base through an insulating rod, and the base is connected to the ground The terminals are connected and the discharge ball is arranged on the base, and the discharge ball is provided with a gap with the arc striker. When lightning overvoltage occurs, firstly, the voltage equalizing ring on the insulating cap distributes the overvoltage evenly to extend the flashover path, and then passes through the arc strike rod from the bottom to the metal arc ball, that is, the gap between the discharge balls Discharge, the continuous power frequency arc releases overvoltage energy to the ground terminal, thereby protecting insulators and insulated wires from flashover and damage, and avoiding accidents of insulators and wires from flashover and broken wires (broken strands).

Description

A Lightning Protection Line Insulator with Functions of Voltage Equalization and Discharge Gap

technical field

The invention relates to the technical field of insulators, in particular to a lightning protection line insulator with functions of voltage equalization and discharge gap.

Background technique

Overhead power transmission and distribution lines are erected in different areas; during the operation of overhead transmission and distribution lines, when they are subjected to direct or induced lightning, humidity or rain, etc., the insulation performance will decrease, which will cause Overvoltage, whose overvoltage value is very high, will form an insulation breakdown discharge fault; one is that the circuit breaker at the head end of the line trips while the insulation is damaged; the other is a breakdown discharge in the insulation, and the local conductor There will also be hot-melt melting faults, and the insulators and the breakdown metal parts will be damaged one after another.

Electric power overhead lines are generally composed of poles (towers), wires, and insulators, wherein: one end of the insulator is fixed on the pole (tower), and the other end supports and fixes the wires. Insulators play two basic roles in power overhead lines, namely, support, fix wires, and isolate and insulate charged bodies from grounding. Under normal working conditions, the insulator can support and fix the wires and the charged body to isolate and insulate from the ground, but in the event of lightning strike, operation or power frequency transient overvoltage, the transmission and distribution lines generally have tripping faults , It may also be caused by the flashover of the insulator surface caused by the discharge, which may cause the insulation performance to decrease or the accident of broken wires and strands.

Therefore, how to provide a lightning protection line insulator with the function of voltage equalization and discharge gap, so as to avoid the accidents of flashover and disconnection of the insulator and the wire, is a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a lightning protection line insulator with voltage equalization and discharge gap functions, so as to avoid accidents of flashover and disconnection of insulators and conductors.

In order to achieve the above object, the present invention provides the following technical solutions:

A lightning protection line insulator with voltage equalizing and discharge gap functions, comprising an insulator body, a voltage equalizing ring, an arc strike rod, a base and a discharge ball, wherein the voltage equalizing ring is sleeved on the insulator On the insulating cap of the body, the arc striking rod is arranged on one side of the bottom of the insulator body, the bottom of the insulator body is fixedly connected to the base through an insulating rod, the base is connected to the ground terminal and the The discharge ball is arranged on the base, and the discharge ball is arranged in a gap with the arc striker.

Preferably, the above-mentioned pressure equalizing ring is an externally connected pressure equalizing ring.

Preferably, the insulator body is provided with a wire groove and an upper pressing block, the wire passes through the wire groove, the upper pressing block is fixed on the insulator body by screws, and the wire is fixed on the in the wire duct.

Preferably, the above-mentioned upper pressing block is provided with a groove, and the groove is arranged in alignment with the wire groove.

The lightning protection line insulator with voltage equalization and discharge gap function provided by the present invention includes an insulator body, a voltage equalization ring, an arc strike rod, a base and a discharge ball, wherein the voltage equalization ring is sleeved on the On the insulating cap of the insulator body, the arc strike rod is arranged on one side of the bottom of the insulator body, the bottom of the insulator body is fixedly connected to the base through an insulating rod, and the base is connected to the ground terminal And the discharge ball is arranged on the base, and the discharge ball is arranged with a gap between the arc striker. When lightning overvoltage occurs, firstly, the voltage equalizing ring on the insulating cap distributes the overvoltage evenly to extend the flashover path, and then passes through the arc strike rod from the bottom to the metal arc ball, that is, the gap between the discharge balls Discharge, the continuous power frequency arc releases overvoltage energy to the ground terminal, thereby protecting insulators and insulated wires from flashover and damage, and avoiding accidents of insulators and wires from flashover and broken wires (broken strands).

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of an exploded structure of a lightning protection line insulator with voltage equalization and discharge gap functions provided by an embodiment of the present invention.

In Figure 1 above:

Insulator body 1, insulating cap 2, voltage equalizing ring 3, arc striker 4, base 5, discharge ball 6, upper pressing block 7, wire groove 8.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a lightning protection line insulator with voltage equalization and discharge gap functions provided by an embodiment of the present invention.

The lightning protection line insulator with voltage equalization and discharge gap function provided by the embodiment of the present invention includes an insulator body, a voltage equalization ring 3, an arc striker 4, a base 5 and a discharge ball 6, wherein the voltage equalization ring 3 is set on the insulating cap 2 of the insulator body 1, the arc strike rod 4 is set on one side of the bottom of the insulator body 1, the bottom of the insulator body 1 is fixedly connected to the base 5 through an insulating rod, and the base 5 is connected to the ground terminal And the discharge ball 6 is arranged on the base 5, and the discharge ball 6 and the arc striker 4 are arranged in a gap. When a lightning overvoltage occurs, firstly, the voltage equalizing ring 3 on the insulating cap 2 distributes the overvoltage evenly and extends the flashover path, and then passes through the arc striker 4 from below to the metal arc ball, that is, the discharge ball 6 The gap discharge between them, and the continuous power frequency arc releases the overvoltage energy to the ground terminal, thereby protecting the insulator and the insulated wire from flashover and damage, and avoiding the accident of flashover and broken wire (broken strand) of the insulator and the wire.

Wherein, the equalizing ring 3 is an externally connected equalizing ring.

When fixing the wire, the insulator body 1 is provided with a wire groove 8 and an upper pressing block 7, the wire passes through the wire groove 8, and the upper pressing block 7 is fixed on the insulator body 1 by screws, thereby fixing the wire on the wire groove 8 In , fixing is more convenient and quicker. In addition, the upper pressing block 7 is provided with a groove, and the groove is aligned with the wire groove 8. The groove and the wire groove 8 just form a through hole for the wire to pass through, which can better fit the wire and improve contact. Fixed area.

The technical standards implemented by the lightning protection line insulator with voltage equalization and discharge gap functions provided by the embodiment of the present invention are:

GB311.7-1988 "Guidelines for the use of insulation and coordination of high-voltage power transmission equipment";

DL/T804—2002 "Guidelines for the Use of Metal Oxide Surge Arresters in AC Power Systems";

DL/T620—1997 "Overvoltage Protection and Insulation Coordination of AC Electrical Installations";

Grade I is common type;

Class II is used in moderately polluted areas (creepage ratio distance 20mm/kV);

Class III is used in heavily polluted areas (creepage ratio distance 25mm/kV);

Class IV is used in extremely polluted areas (creepage ratio distance 31mm/kV).

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (2)

1. a kind of exist with the lightning protection line insulator pressed with discharging gap function, including insulator body, feature In further including grading ring, starting rod, pedestal and discharge ball, wherein

The grading ring is set on the insulator cap of the insulator body,

The side of the bottom of the insulator body is arranged in the starting rod,

The bottom of the insulator body is fixedly connected by insulating bar with the pedestal,

The pedestal is connect with ground terminal and the discharge ball is arranged on the pedestal,

The discharge ball and the starting rod gap setting,

Metallic channel and upper holder block are provided in the insulator body, conducting wire is passed through from the metallic channel, and the upper holder block is logical It crosses screw to be fixed in the insulator body, and the conducting wire is fixed in the metallic channel.

2. according to claim 1 with the lightning protection line insulator pressed with discharging gap function, feature exists In being arranged fluted on the upper holder block, the groove and the metallic channel are to positive setting.