Multistage horn-shaped backflushing compression arc extinguishing lightning protection device

Abstract

The invention discloses a multistage horn-shaped backflushing type compression arc extinguishing lightning protection device, wherein the device main body is internally hollow, is gradually increasedfrom top to bottom, and is of a horn shape, an arc extinguishing path consisting of arc extinguishing pipelines is arranged in the upper half space, an arc guide ball I in close contact with the innerside wall of the device main body is arranged in the lower half space, an arc guide ball III is arranged in each arc extinguishing pipeline, the end portions of every two adjacent arc extinguishing pipelines are connected through a conductive connecting piece, the tail end of the last section of arc extinguishing pipeline is electrically connected with the arc guide ball I at the top, a compressed airflow spraying channel and a backflushing spraying channel are arranged on the side wall of the device main body, and a compressed airflow spraying opening and a backflushing spraying opening areformed in the outer surface of the device main body. According to the invention, by using the device main body with the horn-shaped structure, narrow tube perfusion can be well performed on electric arcs, large density difference and temperature difference are generated, a strong backflushing effect is generated on the electric arcs with large energy, the energy of the electric arcs is greatly reduced, and the electric arcs can be extinguished.

Description

technical field [0001] The invention belongs to the technical field of electric power fittings for power transmission and distribution overhead lines, and relates to a multi-stage horn type recoil compression arc extinguishing lightning protection device. Background technique [0002] In my country, the distribution of power energy and load centers is very uneven, mainly based on coal power generation. Most of the coal resources are concentrated in the northwest region, and the exploitable hydropower resources are mainly concentrated in the west and central regions, while my country's load centers are concentrated in the eastern coastal areas, Beijing-Tianjin-Tangshan and central developed regions. This determines that in order to solve the power problem of the load center in our country, we must vigorously develop hydropower and thermal power generation while building cross-regional, large-capacity and long-distance energy transmission channels. [0003] With the continuou...

AI Technical Summary

Problems solved by technology

The existing "guiding type" lightning protection mode mainly installs parallel protection gaps at both ends of the insulator string. Although it has a simple structure and is easy to install, it does not have an arc-extinguishing function module, so that the short-circuit current continues to flow into the system. Relying on the circuit breaker to cut off the short-circuit current and exchanging the "tripping rate for the accident rate" will easily cause huge safety accidents on the line

At the same time, due to the ablation effect of the short-circuit current, the insulation coordination of the parallel protection gap fails, and the application function is lost

[0004] For example, the patent No. 2015100691235 discloses a countable arc-cutting lightning protection device. Although this patent has played a very good role in lightning protection, it still has some shortcomings. blow out

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