The Quantitative dosage scale utilizes the analog input template in the PLC to collect the data on site in real time. The actual values are calculated according to the different ranges of the flow rate of each weighing module's measuring tank, and the converted values are averaged to minimize the flow rate fluctuations, which facilitates the application of the weighing values to the PID circuit adjustment and ensures the stability of the weighing adjustment. The display of material level adopts the display mode of one way on site and one way in the main control room, which facilitates the real-time monitoring of the material level of the silo from two aspects, and ensures that when the material level is low, the on-site personnel will take the measure of adding material to prevent the occurrence of material breakage.
020-34563445The quantitative batching scale uses an outflowing screw conveyor or an electric vibrator to achieve the purpose of quantitative feeding. When the material in the weighing hopper reaches the lower limit position of the weighing, the outflowing screw conveyor will output a fixed amount according to the current rotational speed, and at the same time, control the material in the silo to quickly descend into the weighing hopper. When the filling reaches the upper limit, the filling stops. The rapid filling can shorten the feeding time and improve the accuracy and control precision of weighing.
The weighing control system, since the scale body is based on the structure of a bucket scale, can directly calibrate the weights, and through the testing of the instantaneous weight of the scale bucket, calculate the actual discharge volume, and then perform closed-loop adjustment, thus achieving a higher control accuracy. It is a continuous feeding and intermittent discharging weighing batching equipment. Since the weight loss control is carried out in the bucket, the structure is easy to be sealed, so in powder material control, compared with using a screw scale, it is a significant improvement. It is possible to use one computer to control multiple batching scales, and users can arbitrarily input relevant parameters, formulas, and can also statistically record the output and raw material consumption. This ensures control accuracy and improves the management level of the factory, enabling the factory to have a significant advantage in competition.
The automatic Batching system is based on controlled weight loss. When the weight is less than the upper limit and greater than the lower limit, it is in the weight loss batching state. The weight loss within a unit time is equal to the actual discharge flow rate. The actual discharge flow rate is compared with the set flow rate to obtain the difference, and the amplitude of the vibrating discharge device is adjusted in time to make the discharge volume constant. When the material in the weighing hopper drops to the lower limit, the control system maintains the discharge speed unchanged, and the discharge device will switch to the volumetric discharge state. The controller outputs a signal that is the constant value of the weight loss batching state to start the feeding equipment. The material from the feeding equipment enters the weighing hopper. When the material in the weighing hopper reaches a certain weight, the feeding stops. At this time, the weighing control instrument precisely weighs and opens the vibrating discharge device to discharge, and enters the weight loss batching state again. Weight loss batching and volumetric batching alternate.
The feeding system adopts various filtering technologies, has a unique digital filtering function and high-quality noise filtering function, and can obtain stable weight values. Programmable analog input and output, users can program the instrument to receive inputs and instructions from other devices, such as equipment start/stop, alarm input. Users can program multiple switch signals to provide various information or trigger auxiliary equipment. Multi-level password protection provides users with different levels of changeable password protection. Super strong anti-interference ability. There are noise and other interference sources around, and this has been fully considered in the design. It has strong anti-noise or other interference ability. Humanized human-machine interface, uses a high-brightness fluorescent display VFD, full Chinese menu animation prompt, can select various weighing interfaces, and the operation is more convenient.
