1. Before starting each shift, the operator should check the oil level of the mixer reducer, the oil level of the discharge gate hydraulic pump, the oil level of the mixing shaft head (should be more than 1/2), whether the lubricating oil level is sufficient, whether the pressure is normal, whether the oil pipes and joints are broken or falling off, and the lubrication points of belt conveyors, screw conveyors, etc., and add lubricating grease.

2. Check whether there are metal objects in the mixer, and whether the fixing bolts of blades, linings, etc. are loose.

3. Turn on the main power switch → turn on the control power switch → turn on the purification power switch → turn on the PLC power switch. Turn on the industrial control power switch → start the monitoring program and check whether the monitoring indicators of the monitoring box are abnormal (oil level, oil temperature, working status of the lubrication sleeve motor).

4. Start the belt conveyor of the mixer without load and run it for 10 minutes to idle and check whether it is running normally, whether there is any abnormal sound, whether the conveyor belt is deviated or broken (if any abnormality is found, notify the machine repair team immediately to eliminate it).

5. Start the air compressor and check whether it is running normally and whether there is any leakage in the air circuit. The air circuit pressure should be maintained at 0.55~0.7Mpa, and the concrete arch air pressure should be 0.02Mpa.

6. Check the water supply system and liquid admixture system. The pipeline is unobstructed and there is no leakage. The water tank and liquid admixture tank have sufficient liquid.

7. Check whether the unloading doors, solenoid valves, cylinder opening and closing are normal, and whether the travel switches and signal lines are working normally.

8. Manually start the screw conveyor to check whether it is running normally. Add grease.

9. It is strictly forbidden to start with load and stop the machine midway. If the machine is stopped due to power outage or other accidents, turn off the main power first, open the lower discharge door of the mixer immediately, and drain and clean the materials in the barrel to prevent condensation accidents. To start again, press "1" to restart.

10. The main machine must be flushed with water once every 3 hours or more, but not more than 4 hours. Use the water supply pump to pump the production water into the main machine, stir and rotate for about 3 minutes, and continue production after releasing the flushing water.

11. When continuously producing high-grade concrete above C40, in addition to stirring and flushing with the main machine, a high-pressure water gun must be used for auxiliary flushing.

12. When the main machine is in production and operation for more than 12 hours but not more than 24 hours, it must be shut down and the auxiliary worker must thoroughly clean the main machine and the material door shaft.

13. Keep records of flushing and cleaning for interval cleaning and periodic cleaning.

14. If the belt conveyor is stopped due to standby during production operation, when it is started again, it must be allowed to run at no load for 2-3 minutes before adding materials for production. It is strictly forbidden to start and add materials at the same time to prevent the belt from being damaged by overload and breaking the conveyor belt.