CN204333600U - A kind of lightning protection device of high voltage supply circuit - Google Patents

Abstract

The utility model discloses a lightning protection device for a high-voltage power supply line, which comprises an insulator, a zinc oxide lightning arrester, a piercing wire clip and an arc striking rod. The piercing wire clip is installed on the upper end of the insulator. It is connected and installed with the gland by a number of connecting bolts. A steel foot is provided at the lower end of the insulator. The zinc oxide arrester is composed of an insulating jacket and a resistance valve set inside it. The zinc oxide arrester and the steel foot are connected through a connecting plate. ;This device forms a discharge gap between the arc striking rod and the zinc oxide arrester, limits the lightning residual voltage above the overvoltage, and fundamentally solves the occurrence of lightning disconnection accidents. It has scientific design, strong practicability, simple structure and The lightning protection effect is reliable, and by setting the upper arc electrode and the lower arc electrode and forming a discharge gap to isolate the power frequency voltage, the zinc oxide arrester can hardly bear the voltage, which greatly prolongs the service life of the zinc oxide arrester.

Description

Lightning protection device for high voltage power supply line

technical field

The utility model relates to electric power protection, in particular to a lightning protection device for a high-voltage power supply line.

Background technique

In high-voltage transmission lines, the transmission wires are easily disconnected or tripped due to lightning strikes. The main reason for the disconnection is that arcs are built on the lightning flashover channel to form power frequency freewheeling, and the temperature of the arc root is very high. The wire can be blown in a short time. Therefore, it is usually necessary to install lightning protection devices on high-voltage transmission lines to avoid the occurrence of the above situation. The lightning protection measures taken by existing high-voltage transmission lines are generally to install overhead ground wires, piercing arc-proof fittings, lightning protection post insulators and oxidation Zinc lightning protection, etc., but these measures still have various problems. For example, the zinc oxide arrester still bears voltage during normal power transmission, and its service life is greatly shortened, which affects the normal lightning protection effect.

Utility model content

The purpose of this utility model is to provide a lightning protection device for a high-voltage power supply line to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A lightning protection device for a high-voltage power supply line, comprising an insulator, a zinc oxide lightning arrester, a puncture clamp and an arc strike rod, the puncture clamp is installed on the upper end of the insulator, the puncture clamp includes a base and a gland, and the gap between the base and the gland is It is connected and installed by several connecting bolts, and a steel foot is provided at the lower end of the insulator. The zinc oxide arrester is composed of an insulating jacket and a resistance valve set in it, and the zinc oxide arrester and the steel foot are connected through a connecting plate; the arc striking The rod and the zinc oxide arrester are arranged on the same side of the insulator, one end of the arc striking rod is connected to the base, and the other end of the arc striking rod is provided with a discharge electrode; the insulator is installed relative to the arc striking rod The other side of the surface is provided with an upper arc-starting electrode, and the other side of the steel foot relative to the installation surface of the zinc oxide arrester is provided with a lower arc-starting electrode. The arc electrode is connected with the connecting plate through a fixing piece, an upper spherical head is arranged on the upper arc striking electrode, a lower spherical head is arranged on the lower arc striking electrode, and an adjusting mechanism is arranged on the lower part of the lower arc striking electrode, and the adjusting mechanism It includes a support plate and an adjusting screw fixedly connected to the lower arc striking electrode, and a threaded hole is opened on the support plate, and the adjusting screw is matched and connected with the threaded hole on the support plate.

As a further solution of the utility model: the connecting plate is composed of a connecting rod with one end fixed on the lower end of the zinc oxide arrester and two stainless steel semicircles arranged at the other end of the connecting rod, and the stainless steel semicircles are clamped on the steel feet superior.

Compared with the prior art, the beneficial effect of the utility model is: the device forms a discharge gap between the arc striking rod and the zinc oxide arrester, limits the lightning residual voltage above the overvoltage, and fundamentally solves the problem of lightning strike disconnection The occurrence of the accident, scientific design, strong practicability, simple structure and reliable lightning protection effect, and by setting the upper arc electrode and the lower arc electrode and forming a discharge gap to isolate the power frequency voltage, the zinc oxide arrester can hardly bear the voltage, Greatly prolong the service life of the zinc oxide arrester.

Description of drawings

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

In the figure 1-insulator, 2-zinc oxide arrester, 21-insulation jacket, 22-resistance valve plate, 23-connecting plate, 3-piercing clamp, 31-base, 32-gland, 33-connecting bolt, 4- Steel feet, 5-upper arc electrode, 51-upper ball head, 6-lower arc electrode, 61-lower ball head, 7-adjustment mechanism, 71-support plate, 72-adjustment screw, 8-fixer , 9-arc rod.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1, in the utility model embodiment, a kind of lightning protection device of high voltage power supply line, comprises insulator 1, zinc oxide lightning arrester 2, puncture line clamp 3 and arc striking rod 9, and described puncture line clamp 3 is installed on the insulator 1, the puncture clamp 3 includes a base 31 and a gland 32, and the base 31 and the gland 32 are connected and installed by a number of connecting bolts 33, and a steel foot 4 is provided at the lower end of the insulator 1, and the zinc oxide arrester 2 is covered by an insulating jacket 21 and the resistance valve plate 22 set in it, the zinc oxide arrester 2 and the steel foot 4 are connected through the connecting plate 23, and the connecting plate 23 is composed of a connecting rod fixed at the lower end of the zinc oxide arrester 2 and set on the The other end of the connecting rod is composed of two stainless steel semicircles, and the stainless steel semicircles are clamped on the steel foot 4; the arc striking rod 9 and the zinc oxide arrester 2 are arranged on the same side of the insulator 1, and the arc striking One end of the rod 9 is connected to the base 31, and the other end of the arc striking rod 9 is provided with a discharge electrode, which forms a discharge gap with the upper end of the zinc oxide arrester 2; The other side of the installation surface is provided with an upper arc-starting electrode 5, and the other side of the steel foot 4 relative to the installation surface of the zinc oxide arrester 2 is provided with a lower arc-starting electrode 6, and the upper arc-starting electrode 5 passes through a fixing piece 8 Connected with the base 31, the lower arc striking electrode 6 is connected with the connecting plate 23 through the fixing piece 8, the upper ball head 51 is arranged on the upper arc striking electrode 5, and the lower ball head 61 is arranged on the lower arc striking electrode 6 A discharge gap is formed between the upper ball head 51 and the lower ball head 61, and an adjustment mechanism 7 is provided at the lower part of the lower arc electrode 6, and the adjustment mechanism 7 includes a support plate 71 and is fixedly connected to the lower arc electrode 6 The adjustment screw 72 on the top has a threaded hole on the support plate 71, and the adjustment screw 72 is connected with the threaded hole on the support plate 71. Screwing the adjustment screw 72 can adjust the gap between the upper arc striking electrode 5 and the lower arc striking electrode 6. discharge gap;

When the power transmission line is running normally, the zinc oxide arrester 2 is isolated from the power frequency voltage through the discharge gap between the upper arc electrode 5 and the lower arc electrode 6. The zinc oxide arrester 2 hardly bears the voltage, which greatly prolongs the oxidation time. The service life of the zinc arrester 2 is to adjust the discharge gap between the upper arc-strike electrode 5 and the lower arc-strike electrode 6 through the adjustment mechanism 7, so that the discharge voltage of the discharge gap benefits the flashover voltage of the insulator 1. When the device is struck by lightning, The discharge gap between the upper arc striking electrode 5 and the lower arc striking electrode 6 is broken down, and the main body of the zinc oxide arrester 2 has low impedance, which discharges the lightning current to the earth through the grounding wire. After the lightning strikes, the power frequency voltage is loaded on the oxide On the main body of the zinc arrester 2, the resistance of the main body of the zinc oxide arrester 2 increases instantaneously, the passing current is suppressed at a lower value, the arc voltage drop of the discharge gap increases, the insulation of the discharge gap recovers rapidly, and the arc is extinguished in a very short time , power frequency freewheeling is completely cut off, thereby preventing tripping and disconnection accidents caused by lightning flashover, and ensuring the reliability of power supply.

The working principle of the utility model is: the device forms a discharge gap between the arc striking rod 9 and the zinc oxide arrester 2, and limits the lightning residual voltage above the overvoltage, fundamentally solving the occurrence of lightning disconnection accidents. Scientific, practical, simple structure and reliable lightning protection effect, and by setting the upper arc electrode 5 and the lower arc electrode 6 and forming a discharge gap to isolate the power frequency voltage, the zinc oxide arrester 2 can hardly bear the voltage, greatly extending the The service life of the zinc oxide arrester 2 is extended.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (2)

1. the lightning protection device of a high voltage supply circuit, comprise insulator, zinc oxide arrester, penetrating cable clamp and starting rod, it is characterized in that, described penetrating cable clamp is arranged on insulator upper end, penetrating cable clamp comprises base and gland, by some connecting bolt connections between base and gland, insulator lower end is provided with steel pin, described zinc oxide arrester is made up of insulating coating and the resistor valve sheet set within it, and zinc oxide arrester is connected by connecting plate with steel pin, described starting rod and described zinc oxide arrester are arranged at the homonymy of insulator, and one end of described starting rod is connected with described base, is provided with sparking electrode at the other end of starting rod, described insulator is provided with upper arc electrode relative to the opposite side of starting rod installed surface, steel pin is provided with lower arc electrode relative to the opposite side of zinc oxide arrester installed surface, described upper arc electrode is connected with base by fixture, lower arc electrode is connected with connecting plate by fixture, upper arc electrode is provided with ball head, lower arc electrode is provided with lower ball head, governor motion is provided with in lower arc electrode bottom, described governor motion comprise supporting bracket and and be fixedly connected on adjusting screw(rod) on lower arc electrode, offer screwed hole on the supporting plate, screwed hole in adjusting screw(rod) and supporting bracket is connected.

2. the lightning protection device of a kind of high voltage supply circuit according to claim 1, it is characterized in that, described connecting plate is fixed on described zinc oxide arrester lower end connecting rod by one end forms with two the stainless steel semicircles being arranged on the described connecting rod other end, and described stainless steel semicircle is fastened on steel pin.