The utility model relates to be used for
powder transmission multistage transmission device, including the
storage tank for storing
powder, with the
storage tank connection first grade screw conveyer, its contained
spiral blade one adopts variable
diameter structure, from the feed end to the
discharge end blade
diameter gradually reduces, and the first grade screw conveyer with horizontal plane inclination angle theta <=15 DEG, the
drive motor of first grade screw conveyer one passes through
frequency changer control rotating speed, with the second grade metering conveyer of first grade screw conveyer connection, the second grade metering conveyer's body has at least installed three weighing sensors, controller, weighing sensor and controller electric connection, the controller passes through communication module with
frequency changer two -way communication, through the utility model can constant blade and the clearance between casing avoid material stagnation, ensure the continuity of conveying, automatic regulation first grade conveyer rotating speed, make
material flow fluctuation be smaller, satisfy high -precision metering demand.