Asphalt mixing plant main configurations: 1, the weighing system * Fly ash from the ash weighing hopper weighing system, pneumatic butterfly valves, sensors and other components. · Fly weighing a fully sealed device, weighing hopper weighing by three sensors. · Weighing hopper feed door with pneumatic valve, open and flexible, sealed tight 2, water weighing system · Water weighing system consists of: user-created reservoirs, pumps, water weighing hopper, pneumatic valve and other components. · Pump under the control of the control system, the pool of water delivered through a submersible pump into the water weighing hopper, when weighed by the sensor to a preset value, the pump stops. Unloaded when unloading pump is turned on, so that the water flow into the mixer. The use of water pumps, the water flow speed, spray evenly. 3, liquid additive weighing system The weighing system consists of a liquid additive: additive tank, said additives, pumps, sensors and other components. · Additive pump controlled by the control system, the admixture admixture box pumping out whenever the metering sensor to a preset value, the valve is closed. ? When unloading pneumatic valve open, so that the flow of water admixtures weighing hopper, together with the water flow into the mixer. At the same time the pump continues to work through another way valve circulation additives, from stirring to prevent precipitation additives, additive pump consists of a microcomputer control switch.