Pressure door for squat silo distributing device

The invention provides a pressure door for a squat silo distributing device and belongs to the technical field of squat silo grain warehousing equipment. The pressure door is used for preventing the automatic grading phenomenon from being generated in the grain warehousing process. According to the technical scheme of the pressure door, a tray is conic and supported by a spring, a center shaft is sleeved with the spring, and the lower end of the center shaft is perpendicularly fixed to the position above a center funnel of an umbrella-shaped distributor of the distributing device; the upper top face of the tray receives falling grain, the grain falls in an annular gap between the peripheral edge of the tray and the inner wall of a material overflowing cylinder, and the tray moves up and down along the center shaft under the supporting action of the spring along with changes of the weight of the received grain; and when the tray moves up and down, the gap between the peripheral edge of the tray and the material overflowing cylinder changes, the flow of the falling grain changes, and the flow of the warehoused grain is adjusted automatically. The pressure door is simple in structure, convenient to use and capable of automatically adjusting the falling flow and speed of the grain, relieving the automatic grading phenomenon in the squat silo grain warehousing process and improving grain warehousing quality.