Square coil sealing structure

The utility model discloses a square coil sealing structure. The device comprises a square rubber ring, the cross section of the square rubber ring is of a square structure. The square rubber ring isdivided into an upper sealing ring and a lower sealing ring; a main inserting block is arranged in the middle of the lower bottom of the upper sealing ring; wherein the upper sealing ring and the lower sealing ring are arranged in an inserted mode through a main inserting block, protruding blocks are arranged on the two sides of the lower sealing ring, an arc-shaped pin is fixed to the bottom of the lower sealing ring, an expansion lifting pin is arranged in the middle of the upper sealing ring in an inserted mode, and arc-shaped lifting blocks are arranged on the two sides of the expansion lifting pin. According to the utility model, the square coil with the structure is adopted; when the main inserting block is inserted, rubber materials of the upper sealing ring and the lower sealing ring expand towards the two