Mobile Hot Mix Plant With Accurate Weighing System

The basic requirements of the weighing system of the mobile hot mix plant is accurate because weighing errors have a great influence on the strength of the asphalt. There are many types of weighing values pre-selected, and the change should be convenient to meet the requirements of multiple ratios and different capacities. The weighing device of mobile hot mix asphalt plant should be simple in structure, firm and reliable, stable in performance and easy to operate. For the specific requirements of the weighing control system of the mobile asphalt mix plant, please see the following introduction.

A big difference between the operating conditions of the load cell in the mobile hot mix plant and the electronic scales generally used for commercial measurement is that the load cell in the asphalt mixing plant is under very harsh operating conditions, and the stress environment is very complex. Compared with the operating environment of electronic products, there is greater randomness. Mobile asphalt mixing plant is usually installed in the open air, the sensor may be exposed to the sun and rain, and the temperature may change drastically. Many construction projects are located in mountainous or remote areas with very harsh natural conditions. Therefore, a larger temperature range and higher humidity conditions must be considered.
 

Asphalt requires water in the production process. A lot of water vapor will also be generated in the process of water transportation and weighing, forming a relatively humid environment in a certain small area. In the temperature-controlled mobile hot mix plant, there are different requirements for high temperature and low temperature conditions. When operating in low temperature conditions in summer, cold air below zero and ice should be added to stir. At this time, condensed water will appear in the building, which shows that the humidity in the building is high.
 

In the production process of asphalt, a large amount of coal ash and appropriate additives are required. These powders will generate dust during transportation and weighing. Even for aggregates, dust is generated during the transportation process. Some of these dust will adhere to the surface of the load cell. Under the combined action of dust and moisture, the sensor will be severely corroded. Therefore, the damage of the sensor of the powder scale is usually more frequent than the sensor of other scales.