Reverse turning bed combined type powder conveying airlock device

The utility model relates to a reverse turning bed combined type power conveying airlock device. A powdered coal bunker is fixed on a coal bunker support. A gate valve is arranged on the lower portion of a feeding pipe of the powdered coal bunker. A spiral reamer scale is hung on the coal bunker support through a flexible steel wire rope. A second tripper valve connected with the lower end of a first tripper valve is arranged under the spiral reamer scale and is fixed on a middle expansion bin which is provided with a material level sensor. The lower end of the middle expansion bin is connected by an airlock rotating valve which is connected with a feed inlet end of a Venturi ejector. A Roots blower is connected with the Venturi ejector. The reverse turning bed combined type powder conveying airlock device overcomes the defects that existing equipment and a large-scale powder conveying device are not tight in sealing device, and prone to air return, dust leakage which cause easy pulse, blowing stop, fire stop