Pile foundation coating device on collapsible loess filling foundation based on driven pile

The pile foundation coating device comprises an outer frame and wheels, the wheels are arranged at the four corners of the lower end of the outer frame, a front door is arranged at the front end of the outer frame, a control box is arranged at the right end of the outer frame, a connecting wire is arranged at the lower end of the control box, and the connecting wire is connected with the outer frame. A handle is arranged on the right side of the upper end of the outer frame, a feeding hopper is arranged at the upper end of the outer frame, a fixing piece and a spring are arranged in a fixing inserting rod, fixing blocks are arranged on the upper side and the lower side of the fixing piece, the two fixing blocks both penetrate through the front end of the fixing inserting rod, and through the two exposed fixing blocks, the feeding hopper is arranged on the upper end of the outer frame. The upper cover and the feeding hopper are fixed through the fixing insertion rod, the fixing piece can move in the fixing ins