Real -time mixer in pit

The utility model particularly relates to a real -time mixer in pit, the mixer is the cylinder, and the centre bore of this cylinder supreme and be first section centre bore, second section centre bore, third section centre bore, fourth section centre bore down respectively, first section centre bore, second section centre bore, third section centre bore, fourth section centre bore are cylindrical through -hole, a tangential direction circumference evenly distributed 4 -8 elongated slot shape whirl through -hole is followed to third section centre bore inner wall. The utility model discloses real -time mixer in pit has overturned traditional ground facing sand concentration control technique for real time control sand concentration becomes reality in the pit during the fracturing, and real time control sand concentration is favorable to avoiding pit shaft sand plug and fracturing string sand card in the pit for fracturing is safer, simultaneously, real time control sand concentration is favorable to the pulsed to add the sand fracturing in the pit, produces the seam net when helping the fracturing, enlarges the fracturing and reforms transform the volume, improves fracturing yield increasing effect.