Concrete mixing plant operating principle and control requirements

First, the working principle:

Concrete mixing batch plant is divided into four parts: sand feed , powder ( cement , fly ash, expanders , etc. ) to feed , water and feed additives , transmission mixing and storage. Their workflow shown in Figure 1 , mixer control system power , into the human - machine dialogue operation interface, system initialization process , including the recipe number , grade of concrete , slump , the amount of the production side , etc. According to the weighing of each hopper, metering hopper for detected, the output signal feeding empty or filled material , prompting the operator to determine whether to start mixing control procedures. started sand, stone belt motor fed into the weighing hopper ; open fly ash, cement tank valve, start the screw conveyor ash electromechanical cement to the weighing hopper ; open positions and admixtures pool water control valve inflow of water and additive metering hopper . metering meet the set requirements on metering Doudou door , ingredients into the blender started mixing , to the set time to open the door mixer , dry mix concrete batch plant into the material has been received within .

Second, the control requirements:
1 , each of the cylinders , control valves and motors by diesel engine concrete mixer processes required to run the various cylinders, control valves and motor control must be accurate, stable and reliable.
2, the control system with automatic or manual mode , and the relationships between independent and mutually constrained .
3, the system has a good anti-jamming capability and sound alarm self- protection.
4, through communication with the computer , you can display system status , fault alarm .