A kind of anti-breakdown lightning protection column insulator

Abstract

The invention discloses an anti-breakdown lightning protection column type insulator, and relates to the field of electric power system power distribution. The insulator comprises a core rod, the corerod is provided with a wiring device, an insulator umbrella, an arc striking rod, a limiting block and a rotating block, the limiting block is fixedly connected with the core rod, and the rotating block is rotationally connected with the core rod. A height adjusting rod capable of moving in the vertical direction is arranged on the rotating block. A through hole in the horizontal direction is formed in the height adjusting rod, and the arc striking rod is arranged in the through hole and can horizontally move along the through hole. An annular electrode matched with the arc striking rod is arranged at the lower end of the core rod, the annular electrode can move in the vertical direction, and the moving distance of the annular electrode in the vertical direction is larger than or equal tothat of the height adjusting rod. The insulator has the beneficial effects that the arc striking rod not only can rotate around the core rod, but also can move in the horizontal and vertical directions, and the discharge gap distance can be effectively adjusted; and an inner gap structure and a discharge gap are combined, so that the capability of the insulator for dealing with lightning stroke accidents is improved.

Description

technical field [0001] The invention relates to the technical field of power distribution equipment in a power system, in particular to a breakdown-resistant and lightning-proof column insulator. Background technique [0002] The insulator is a special insulation control, which can play the dual role of supporting the wire and preventing the grounding of the current in the overhead transmission line. Insulators are used in the connection between the pole tower and the wire, and the connection between the frame of the substation and the line. Insulators are exposed to the atmosphere all the year round and are vulnerable to lightning strikes, resulting in damage to the insulators. [0003] Lightning protection post insulators in the prior art, such as figure 1 As shown, the distance between the ball head of the insulating arc striking rod and the mounting bracket is less than the distance c of the discharge gap. When there is a lightning flashover near the line tower, the li...

AI Technical Summary

Problems solved by technology

Insulators are exposed to the atmosphere all the year round and are vulnerable to lightning strikes, resulting in damage to the insulators

[0003] Lightning protection post insulators in the prior art, such as figure 1 As shown, the distance between the ball head of the insulating arc striking rod and the mounting bracket is less than the distance c of the discharge gap. When there is a lightning flashover near the line tower, the lightning pulse voltage on the line first breaks down the shortest air gap distance, causing the high voltage arc striking rod and Metal support discharge, due to factors such as small gap distance and gap unevenness, it is difficult to extinguish the arc in time, forming a ground fault and increasing the tripping rate of the line; even in wet or heavy rain weather, a loop is formed at the gap distance, and the line is single-phase grounded Tripping, unable to provide normal power supply, affecting the normal production and life of residents

Secondly, due to the limitation of the line space corridor, sometimes multiple lines are erected on the same base tower, especially if the equipment tower is installed, there are many jumper lines on the pole, and the direction of the arc striker rod of the existing lightning protection post insulator is fixed, which is very difficult. It is difficult to ensure the electrical safety distance between the lightning protection post insulator arc rod and other equipment or lines, which affects the safe operation of the line

Finally, in the prior art, since the discharge gap distance between the arc striker and the lower steel foot is fixed, but the external weather changes frequently, it is easy to cause malfunction or discharge action cannot occur

[0004] Chinese patent CN109390111A discloses a lightning protection post insulator, the arc striking rod of the insulator can rotate around the mandrel, although it can ensure to a certain extent that the safety distance between the ball head of the arc striking rod and other metals or conductors on the rod is greater than that of the insulator The discharge gap distance of the arc strike body, but the discharge gap distance between the arc strike rod and the electrode is fixed; at the same time, because the arc strike rod of this patent can rotate, the insulating protective cover in the prior art is not suitable for this patent

Chinese patent CN207611649U discloses a "lightning protection pillar insulator capable of adjusting the discharge gap". Although the patent can adjust the discharge gap, the structure is more complicated and the production cost is higher

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