The hot aggregate metering device is a metering device for the forced batch asphalt mixing plant. Its function is to measure the sandstone materials of different specifications temporarily stored after being sieved, according to the aggregate grading and proportioning requirements. , to achieve the required gradation and ratio requirements.
There are usually two methods of measurement: mass measurement and volume measurement, and hot aggregate measurement is generally measured by mass.
The weighing scale has different forms such as lever scales and electronic scales.
The electronic scale has small volume, high precision and convenient installation, and is suitable for long-distance automatic control, but it has high environmental requirements and complicated maintenance.
At present, electronic scales are basically used on asphalt mixing plant.
The electronic scale consists of a measuring bucket, a pressure or tension sensor, and an electronic measuring device.
The metering system of the forced batch asphalt mixing plant is directly opposite the hot aggregate metering bucket under the hot aggregate storage bin and is hoisted under the thermal storage bin by four load cells.
The sand materials of different specifications fall into the measuring bucket according to the grading quality ratio. After the cumulative amount of buckets reaches the set value, the measuring bucket discharge door is opened and unloaded in the asphalt mixing plant.
When the measuring bucket falls into the material, the resistance value of the strain gauge in the sensor changes, so that the voltage value passing through the sensor changes, the changed value is transmitted to the ADC0809 for A/D measurement conversion, and the converted signal is transmitted to the single chip microcomputer. .
The MCU transmits the measured value to the industrial computer, and the industrial computer sends the control signal to the MCU or the MCU to generate the corresponding control signal according to the program and output it, and the control actuator completes the corresponding action.