The invention discloses an air-gap-free semi-closed double-backflushing arc extinguishing
lightning protection device and application thereof. The arc extinguishing device mainly comprises an arc extinguishing body and a backflushing arc extinguishing
assembly, wherein the interior of the arc extinguishing body is of a hollow structure, a partition plate is further longitudinally arranged in the middle of the interior of the arc extinguishing body, and divides the internal space of the arc extinguishing body into two sets of backflushing pouring arc extinguishing channels, a backflushing arc extinguishing
assembly is fixedly mounted at the upper end of the backflushing
perfusion arc extinguishing channel on the left side, a backflushing
nozzle extending towards the side surface of the arcextinguishing body is formed in the lower end of the backflushing
perfusion arc extinguishing channel, the upper end of the backflushing
perfusion arc extinguishing channel at the right side is a backflushing
nozzle extending towards the side surface of the arc extinguishing body, and the lower end is fixedly provided with a backflushing arc extinguishing
assembly. The device can restrain and control the arc path, eliminates the harm of arc drift, is wide in application range, is installed at a time, can be repeatedly used for a long time, is low in operation cost, is high in sensitivity, andfacilitates the safe production of
electric power.