Blower unit for pneumatic mixers and apparatus for the pneumatic mixing of granules, powders and/or liquids comprising said blower unit

An apparatus for the pneumatic mixing of granules, or granules and liquids, comprising:

• a hopper suitable to contain granules and/or liquids and provided, on an outer surface thereof, with a plurality of manifolds defining respective internal ducts in fluid connection with an interior of said hopper;
• a plurality of blower units for pneumatic mixers, each detachably connected to a respective one of said manifolds;
• at least one pressurized air supply system detachably connected to said blower units;
• wherein each blower unit comprises:
• a hollow element internally defining a duct, extending between an input section and an output section, for the passage of an air flow between said sections, wherein said input section is configured to be detachably connected to the pressurized air supply system and said output section is configured to be detachably connected to the respective one of the manifolds;
• an abutment element positioned at the output section and including a stop surface defining an output flow passage, the stop surface having a truncated cone or convergent shape, the stop surface extending an entirety of a circumference of the outlet flow passage, and the abutment element being removable from and replaceable to the hollow element;
• a shutter having a head portion movable through the output flow passage in a controlled manner between a closed position and a fully open position, the head portion having a shape corresponding to the shape of the stop surface to define a flow area of the output flow passage between the stop surface and the head portion and to interact with the stop surface to provide for a hermetically closed configuration of the output flow passage in the closed position to shut off said air flow through said output section;
• an actuator connected to the shutter and configured to adjust a travel of the shutter to regulate the position of the head portion with respect to the stop surface and thereby regulate the flow area of the output flow passage;
• wherein said hollow element has a first end portion, at said output section, that is configured to be detachably coupled to a corresponding end portion of said manifold;
• a first detachable connector configured to establish a reciprocal connection between the first end portion of the hollow element and the corresponding end portion of the respective one of the manifolds.