Screw feeder constructs

The utility model discloses a screw feeder constructs, it includes cylindric section of thick bamboo cover, spiral hopper core, hopper base, rotary electromagnet and magnet mounting disc, spiral hopper core is installed in cylindric section of thick bamboo cover, and the top of spiral hopper core is equipped with the top cap, spiral hopper core is installed to the hopper base on, rotary electromagnet installs between hopper base and magnet mounting disc, and is equipped with the electro -magnet pivot on the rotary electromagnet, rotary electromagnet passes through the electro -magnet pivot and installs the below at the hopper base, be equipped with swing piece in the electro -magnet pivot, the swing piece is equipped with a mounting hole including installation department and fan -shaped movable part in the middle of the installation department, and electro -magnet pivot cover is established to the mounting hole in. The utility model discloses simple structure, easy operation is convenient, has not only practi