Submersed nozzle structure of slab continuous casting crystallizer

The utility model discloses a slab continuous casting crystallizer submersed nozzle structure which comprises a submersed nozzle body, a bucket-shaped groove and a tubular groove are sequentially formed in the submersed nozzle body from top to bottom, the bucket-shaped groove is communicated with the tubular groove, and an anti-blocking mechanism is connected in the tubular groove. The anti-blocking mechanism comprises an electric sliding rail, a sliding block and a mounting ring; the electric sliding rail is axially mounted on the inner wall of the tubular groove; one end of the sliding block is installed in the electric sliding rail and slidably connected with the electric sliding rail, and the other end of the sliding block is connected with the installation ring. The installation ring is arranged in the tubular groove, and a first scraping block and a second scraping block which are protruded are distributed on the outer surface of the installation ring. According to the device, molten steel is effectivel