Cast iron gate embedded with engineering plastic

The utility model relates to a cast iron gate embedded with engineering plastic. The cast iron gate comprises a cast iron gate plate, a cast iron gate frame and a spiral lifting mechanism. The cast iron gate plate is provided with a lifting lug. The cast iron gate plate is connected with a hoist through the lifting lug. The gate frame is fixed to a soil building. The gate plate is matched with the gate frame in a couple-piece mode. The gate plate is of an arc plate structure. The rear side of the gate plate is provided with a pressure plate connected with the gate frame. The gate plate is installed in cooperation with the gate frame through the pressure plate. A left stand column and a right stand column of the gate frame are respectively provided with a plurality of wedges. The spiral lifting mechanism penetrates through a top beam of the cast iron gate frame and is connected with the cast iron gate plate, and the spiral lifting mechanism and the top beam of the cast iron gate frame form a thread pair. The o