Screw rod weigher screw scale is based on continuous dynamic feeding and metering, and its metering accuracy depends on the precise cooperation between the feeding screw and the metering screw. The feeding screw removes the material from the bin or hopper at a set speed according to the instruction of the control system, and feeds it into the metering screw. It is mainly composed of motor, drive shaft, screw shaft, hopper and other parts. Among them, the motor is the power source of the Feeding machine, which transmits the power to the spiral shaft through the transmission shaft, so that the spiral shaft rotates and conveys the powder and granule upward. The hopper is the container of the powder foam feeding machine, through the rotation of the spiral shaft, the powder will be conveyed upward from the bottom of the hopper. Due to the rotating effect of the screw shaft, the powder granular body is subject to friction and inertia, and is continuously transported upward until it reaches the silo or production line.

The screw scale feed screw is responsible for uniformly feeding the material from the silo or hopper into the metering section, where it is regulated by a variable frequency governor to control the feed rate, which is conveyed to the outlet at a constant speed and accurately metered. The speed of the metering screw is usually constant to ensure accurate metering. Mounted below the metering screw, it is used to detect the weight of the material on the metering screw and convert this weight signal into an electrical signal. Weighing controllers, etc. are responsible for receiving signals from the load cell, data processing and issuing control commands.

Frequency conversion screw scale has human-computer interaction, communication, display and storage, printing and other functions, and has data, graphic display, status monitoring, data input, information storage and other related operations of various functional screens. It can realize real-time process data monitoring, simulation display process flow, real-time data record access, operator privilege setting, process parameter setting, setting alarms for running process events and switching between manual and automatic control. The on-site touch screen displays real-time flow, load, totalized value, temperature, and so on. Through the field instrumentation and motor current through the field transmitter remote transmission to the central control room centralized display. Frequency converter regulation is equipped with automatic switching switch, communicating with the main control computer, and the man-machine interface displays the proportioning parameters (formula) and monitors and records the real-time data.

Workflow:

Start-up and calibration: Before system start-up, the spiral scale will be zero calibrated to ensure that the output of the load cell is zero in the absence of material.

Setting parameters: according to the requirements of the production process, set the feeding speed, metering accuracy and other parameters of the spiral scale.

Start feeding: the feeding screw starts to work, removes the material from the bin or hopper and feeds it into the metering screw.

Continuous metering: the metering screw conveys the material to the outlet, while the load cell detects the weight of the material in real time, and the control system adjusts according to the detected data to maintain the metering accuracy.

Data Recording and Feedback: The spiral weigher will record and feed back the measured data to the control system in real time for subsequent production management and data analysis.

Spiral weigher realizes the continuous dynamic feeding and metering of granular materials through the precise cooperation of feeding and metering screws, as well as the cooperative work of load cell and control system. This metering method is not only efficient, but also highly accurate, and can meet the needs of various industrial production.