The weighing belt conveyor is used for the quantitative feeding of bulk materials, the feeding process is a continuous feeding of the belt, the feeder will be from the user feed silo or other feeding equipment to transport the material and through the weighing bridge for weight detection, at the same time mounted in the tail pulley of the speed sensor to detect the speed of the belt. The measured weight and speed signals are sent to the accumulator for differential processing and display the instantaneous flow in tons per hour for comparison, and according to the size of the deviation from the output of the corresponding signal value (PID signal), through the frequency converter to change the speed of the motor to change the feeding volume, so that it is a certain amount of time with the set value, so as to complete the control of a constant feeding flow.
020-34563445The belt scale measures the transmitted weight by first determining the instantaneous charge density and the belt distance, and feeding the Feeder with the measured values as input signals to a calculation device with multiplication and integration functions. Belt feed detectors, integrated controllers and drive units, charge detectors, belt feed detectors and drive units are installed as components of the feeder, the charge detection unit consists of bearing rollers and two Weighing modules, two weighing modules measure the mass (gravity) on the precision weighing table and transmit the signal to the integrated controller, the signals from each sensor are compared with the previous data, the other weighing sensor's Each load cell signal is compared with the previous data and the signal of the other load cell to check the validity of the signal. If the signal is valid, the signal is multiplied by a correction factor to obtain the actual mass per unit length of the belt. If the signal measured by the load cell is not valid, the control process automatically shifts to the volumetric mode of operation and an alarm is issued for a fault in the Weighing system. In the volumetric mode of operation, the integrated controller adopts the corresponding stored data according to the actual measured density of the material and provides the optimum method of control in this mode.
The belt feed measurement unit is a pulse generator mounted on the drive unit to measure the belt feed length. The measured value is transmitted to the integrated controller.
The drive unit receives the signals generated by the integrated controller at the drive motor controller and controls the speed of the drive motor so that the material is supplied to the grinding machine at a constant speed and the drive motor drives the belt through the speed reducer and the active pulley.
The integrated controller calculates the loading signal and the belt feed length signal from the detection system. The belt feed speed is determined by the motor, and the motor signal is transmitted to the integrated controller and multiplied by a correction factor to obtain the distance the belt feeds per second. The signal from the load sensor (mass per unit length) and the signal from the motor (belt displacement per second) are multiplied to obtain the material transfer per second.
This value is then compared with the required signal and if there is a difference, the integrated controller adjusts the motor control.
In order to display the feeding speed and provide a record of the feeding weight, the integrated controller also performs a time integration operation on the actual transmission data, which is stored in the non-volatile memory of the integrated controller.
