Why can electronic belt scales become widely used belt conveyor weighing scales?

In industries such as building materials, steel, mining, cement, and grain, belt conveyors are extensively utilized to transport large quantities of bulk materials continuously, efficiently, and without the need for manual handling, resulting in low costs.

With the development of refined production and management in enterprises, there is a need to incorporate weighing and metering functions during the bulk material transportation process to facilitate enterprises in monitoring the weight of transported materials for the purposes of cost calculation and control, sales and trade settlement, and production process control. Devices that perform material weighing during the belt conveyor transportation process are known as belt conveyor weighing scales.

There are various metering methods for belt conveyor weighing scales. For instance, nuclear belt scales complete metering by measuring the attenuation of gamma rays absorbed by the material, laser belt scales utilize scanning to determine the volume and density of the material pile for metering, and electronic belt scales employ load cells and speed sensors for metering.

Regardless of the type, all belt conveyor weighing scales can continuously measure the instantaneous flow rate and cumulative flow rate of materials passing through the conveyor and are classified as dynamic weighing instruments. However, the most widely used and prevalent belt conveyor weighing scale across various industrial settings is the electronic belt scale.

The reasons why electronic belt scales have become the most commonly used belt conveyor weighing scale lie in their structural and application characteristics, as well as technological advancements that have enabled electronic belt scales to overcome their limitations, achieve higher metering accuracy, and provide users with more production process control functions.

1. Structural and Application Characteristics of Electronic Belt Scales

   - The main components of an electronic belt scale include load cells, speed sensors, instrumentation, and a scale frame, resulting in a simple structure. It detects the weight of materials passing on the belt without involving factors such as material volume or density, thus imposing minimal restrictions on the materials. Unlike nuclear and laser belt scales, which require materials to have regular shapes and constant densities, electronic belt scales can measure a wide range of bulk materials, regardless of whether their volumes are regular or densities are constant.

   - Additionally, the gamma rays used in nuclear belt scales are radioactive, and their application requires approval from environmental protection authorities. In general working conditions, nuclear belt scales are not suitable for use.

2. Technological Breakthroughs Overcoming Limitations of Electronic Belt Scales

   - Throughout the application and development history of electronic belt scales, metering accuracy and stability have been persistent challenges for users and manufacturers. Due to their industrial environment, metering can be easily affected, making them unsuitable for many high-precision applications. However, with advancements in design concepts, structures, and technologies, the performance of electronic belt scales has significantly improved.

Their ability to withstand harsh working conditions has also enhanced, with high-precision models achieving accuracies of up to 0.2%. For example, array belt scales employ a fully suspended combined scale frame structure to effectively eliminate the impact of environmental dust accumulation, belt tension, mechanical components, and self-weight on metering. Digital load cells with various compensation and protection functions can resist electromagnetic interference, environmental temperature, and lateral forces affecting weight detection and signals. Speed sensors with dual-wheel cart rubber-coated designs can effectively withstand mechanical vibrations and prevent false readings.

In summary, electronic belt scales have greatly enhanced their metering accuracy and stability through technological and design advancements, enabling their application in high-precision metering scenarios. Furthermore, by integrating with industrial automation control, computer management, and other technologies, electronic belt scales offer users more solutions for production operation control, expanding their range of applications.