A belt scale is an automatic weighing instrument that can continuously and dynamically weigh bulk materials without interrupting the movement of the conveyor belt widely used in material metering scenarios across various industrial production sectors.

I. Core Working Principle

Signal Acquisition: The metering idler detects the weight of the material on the belt, acting on load cell through a lever mechanism to generate a voltage signal proportional to the belt load.

Speed Matching: The speed sensor is directly connected to the measuring pulley, outputting a pulse signal to the belt running speed.

Calculation and Output: The weighing indicator performs integral calculations on the weight and speed signals, displaying the instantaneous flow rate and cumulative total weight of the in real time.

II. Main Structural Components

Weighing Bridge: As the core load-bearing component, common types include double-lever multi-idler, single-idler cantilever, and suspended types.

Sensing Unit: Includes the load cell and speed sensor, which are key components determining metering accuracy.

Control Indicator: Equipped with functions such as data display automatic zeroing, fault self-diagnosis, flow control, and data printing.

III. Common Classifications

By Weighing Principle: Divided into mechanical (roller belt scale) and electronic types with electronic being the current mainstream application.

By Belt Speed Characteristics: Divided into single-speed belt scales and variable-speed belt scales (such as speed-regulating belt scales).By Scale Frame Structure: Divided into different types such as suspended, floating, direct-load, and lever types, catering to different accuracy requirements.

IV. Typical Application Scenarios

/Coal: Real-time metering of raw coal and ore transport volume, supporting production statistics and settlement.

Building Materials/Cement: Precise weighing of raw materials such as limestone, cl, and sand/gravel to ensure stable production ratios.

Power/Metallurgy/Ports: Achieving 24-hour continuous metering for fuel coal feeding, raw material input, dock loading/unloading.

Chemical/Grain: Completing stable metering of granular and powdery materials to meet inventory control and process requirements