Full-automatic pillow-type big bag packaging machine for acid and alkali resistant washable granular materials

The invention provides a full-automatic pillow type big bag packaging machine for acid and alkali resistant washable granular materials, belongs to the technical field of material packaging machinery, and solves the problems that the product structure of the existing granular flaky caustic soda material packaging machinery needs to be improved and the existing granular flaky caustic soda material packaging machinery is not suitable for being connected with a caustic soda production line. A centering mechanism, a servo transverse bag supply mechanism, a filling mechanism, an upper trolley, a leading-out mechanism, a vertical bag conveying mechanism and a bag supporting device are connected to a packaging machine body, the rear portion of the centering mechanism is connected with the servo transverse bag supply mechanism and then connected with the filling mechanism, and the rear portion of the filling mechanism is connected with a bag conveying trolley mechanism and then connected with the leading-out mechanis