Automatic weighing and feeding device

The utility model discloses an automatic weighing and feeding device which comprises a feeding bin, a discharging bin, a first-level conveying belt, a second-level conveying belt, a stirring device, a first motor, a second motor, a first frequency converter, a second frequency converter and an electronic scale. The automatic weighing and feeding device is characterized in that the first-level conveying belt and the second-level conveying belt are located below an outlet of the feeding bin and below an outlet of the discharging bin respectively, and the first-level conveying belt is driven by the first motor, the first motor is connected with the first frequency converter, the second-level conveying belt is driven by the second motor, and the second motor is connected with the second frequency converter; the electronic scale is located below the second-level conveying belt and can weigh materials on the second-level conveying belt; and a feeding port of the stirring device is located below the tail end of the second-level conveying belt. By means of the automatic weighing and feeding device, an operator can control the discharge speed and the weight of the materials better; under the condition that sodium carbonate is quantitative, solid water glass with different moduli can be obtained by changing the weight of quartz sand, the whole operation process is simple, the labor intensity is low, and the efficiency is high.