The weighing pulverizer is a Feeding machine specially designed for the pitch and diameter of the screw conveyor. The flow rate of the screw pulverizer is automatically regulated by adjusting the rotational speed of the weighing pulverizer. Under the automatic adjustment of the feeding volume, the current detection device of the crusher detects the working current of the crusher in real time and transmits the signal to the PLC. By comparing it with the set current, the opening degree of the feeding door and the rotational speed of the variable frequency motor are adjusted to achieve the purpose of automatic control of the feeding volume.

The weighing crusher takes the hopper scale and the screw feeding mechanism as the entire scale body. Through the weighing instrument or PLC, the weight signal of the scale body is continuously sampled, and the change rate of weight per unit time is calculated as the instantaneous flow rate. Then, through various software and hardware filtering technologies, the "actual flow rate" that can be used as the control object is obtained. Then, the PLC performs control operations to approach the target flow rate through the PID feedback algorithm and outputs regulating signals to control the frequency converter and other Feeder controllers.

The weighing crusher detects the flow rate of the screw scale through RS485 communication and provides the motor and control current of the motor according to the ratio. The PLC output controls the motor and frequency converter, making the material discharge change with the flow rate of the screw scale. The motor ratio control is PID regulation control. The control screw conveyor is collected through communication. According to the process requirements for proportioning, the corresponding tracking flow is calculated and transmitted to the PLC. The weighing module controls the fast and slow screws of the frequency converter to keep the corresponding batching flow within the maximum range of the tracking flow. The start and stop control of the equipment can be achieved through the start and stop buttons, and the start and stop buttons on the process after the human-machine interface can also be operated.

According to the system's functions, the opening degree of the feeding door is infinitely adjusted by the stepping motor, the rotational speed of the screw is regulated by frequency conversion, and the detection device feeds back the operation of the crusher. The mechanical part of the feeding control system mainly consists of a screw and a quantitatively adjustable feeding door. The screw is driven by a variable-frequency motor, and the feeding amount can be fine-tuned by changing its rotational speed. The feeding door is driven by a stepping motor. By adjusting its opening degree, the feeding amount can be roughly regulated. The controller section mainly consists of important components such as the current detection and transmission device for the crusher, the feed door switch detection device, the sound and light alarm, the PLC, the touch screen display, the frequency converter and the stepper motor driver.

The weighing pulverizer mainly consists of a silo, a hopper scale, a material trough pipeline and a screw conveyor. Among them, the material trough adopts a rectangular spiral shape design. The number of material troughs can be increased or decreased according to actual needs. There is a weighing module under the material trough for weighing, which is designed in a funnel shape. Some photoelectric sensors are installed on its inner side. When materials need to be added, The lid under the funnel is opened by the solenoid valve to start discharging materials into the conveying screw. When the material descends to the next weighing module in the silo screw, the lid under the funnel closes and the discharging is completed.

The automatic crusher can centrally control the start and stop of the motor, automatically adjust the operating speed of the feeding motor, and adjust the operating speed of the classification motor at any time. It can also adjust the rotational speed of the feeding motor and the classification motor. The linear velocity at the end of the spiral, when the sieve holes are constant, each material has its corresponding optimal linear velocity. The productivity of the crusher keeps increasing with the rise of the linear speed, but at the same time, the power consumption also increases, and the particle size of the finished product becomes smaller. To increase the output, different linear speeds are taken for the rotors. The former takes a smaller linear speed, while the latter takes a larger linear speed.

The crusher is equipped with a large funnel-shaped screw (the screw is parallel to the rotor axis) on the hopper scale shell. The height of the funnels on the left and right funnel wheel plates varies from large to small in the direction of the screw's rotation, and the pipes vary from wide to narrow. Moreover, all funnels are inclined at an Angle to the left or right of the screw's rotation plane, and their tangent values are less than the friction coefficient of the material against the funnel plates. That is, the inclination Angle α is 30°, so this kind of funnel plate is called a variable-height inclined funnel plate. It can prompt the materials to move in an "8" shape around the shell of the crushing chamber under the impact and friction of the screw, and be constantly rotated during the movement, which is conducive to the shearing and rubbing crushing of the materials. Moreover, it can automatically clean the fine crushed materials entering the pipeline, preventing the funnel plate pipeline from being blocked by powder. In order to enhance the rubbing and friction on the materials, a large funnel screw is installed throughout the inner circumference of the upper shell.