Material continuous dynamic metering device

Abstract

The invention discloses a material continuous dynamic metering device comprising a frame, a material storing hopper, a metering hopper and a conveying belt machine. The material storing hopper is located above the metering hopper, the lower portion of the material storing hopper is provided with a material gate, the material storing hopper is integrated with the conveying belt machine driven by a variable frequency motor and is hung on the frame through a plurality of weighting sensors, the weighting sensors are connected with a weighting controller, and the weighting controller is connected with a solenoid directional valve which is used for controlling the material gate to open and close and a variable frequency controller which is used for regulating rotating speed of the variable frequency motor. The material continuous dynamic metering device has the advantages of reasonable design, stable and reliable operation and accurate metering.

Description

Technical field: [0001] The invention relates to the technical field of asphalt mixture processing equipment, in particular to a material metering device for an asphalt mixing plant. Background technique: [0002] Continuous asphalt mixing equipment is different from general batch mixing equipment because of its continuous production of asphalt mixture, so the delivery of finished asphalt mixture must be continuous. [0003] The traditional continuous dynamic measurement methods generally use electronic belt scales or volumetric measurement methods, but both electronic belt scales and volumetric measurement methods have defects such as low measurement accuracy, poor stability, and many influencing factors. [0004] Belt weighing is based on the principle of leverage, and a lever device is installed under the continuously running belt. The bearing surface of the lever is a few roller devices, which are used to reduce the measurement error caused by the friction between the be...

AI Technical Summary

Problems solved by technology

However, factors such as the vertical installation error of the idler roller, the degree of tension of the belt, and the deviation of the belt cause large measurement errors, and from a structural point of view, its stability, reliability, anti-vibration and anti-eccentric load capabilities are difficult to be guaranteed. Difficult to use in occasions requiring high measurement accuracy

[0005] Volumetric measurement is to control the weight of the material per unit time by multiplying the volume of the material passing by the material per unit time by the bulk density of the material. Due to the unevenness of the material or the instability of the material belt, the measurement will have a large error

[0006] To sum up, when the continuous asphalt mixing plant mixes asphalt mixture with high requirements on gradation, it is difficult to meet the continuous measurement accuracy requirements of the material, whether it is volumetric measurement or electronic belt scale

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