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Operation specification for concrete mixing plant

Author: admin Release time: June 9, 2017 Number of visits:

1、 Preparation before operation

1. Motor part, according to the relevant provisions of the general operating procedures.

2. Check whether the power supply voltage matches the working voltage required by the equipment, and the larger allowable deviation is ± 5%.

3. Check whether the connecting bolts of each part are loose, and fasten them if they are loose.

4. Check whether the concrete mixer has abnormal noise, whether the rotation direction is correct, and whether the closing and opening of the discharge door are tight and in place.

5. Check the air compressor for abnormal noise and air leakage. The pneumatic equipment can only be used when the pressure of compressed air is maintained in the range of 490-686kpa.

6. Check whether the drive device of the feeder is free when running on the track and entering the weighing table. Check whether the tension of wire rope is appropriate.

7. Check whether the water pressure, water cleanliness and flow meet the standard.

8. Check whether the weighing device is intact and accurate.

9. Set the pointer of all instruments on the device to "0".

10. In order to ensure the cooling of the vibrator, the dust accumulated on the surface of the vibrator must be removed in time, and the cable should be checked for damage.

11. If the equipment that has been inspected or has been shut down for a long time is to be put into use again, it must be manually run for trial run by simulating the production program, and then the automatic circulation production can be carried out after confirming that it is normal.

12. According to the production requirements, determine and adjust the operation parameters of each communication device.

13. Check whether the leakage protection device is reliable and effective.

2、 Requirements in operation

1. In the process of batching, attention should be paid to whether the pointer of each electronic scale stops at the given weighing position, and adjustment should be made in case of incorrect situation.

2. Keep the operating room clean. It is not allowed to open the window for ventilation.

3. Personnel not related to work shall not enter the working site of concrete mixing equipment, nor shall they enter the operation room.

4. It is strictly forbidden to load large stones or other foreign matters into the aggregate bin.

5. When using bagged cement, it is strictly forbidden to bring the thread end and lining paper into the cement conveyor.

6. If the feeder is stuck by foreign matters, it must be wound manually and cut off the power supply. It is forbidden to use the motor.

7. For the mixing equipment with emergency shutdown device, the shutdown device should be used immediately when the equipment and personnel are in danger.

8. In case of sudden shutdown of the equipment during operation, the power supply shall be disconnected, and it shall not be started again until the cause of the fault is found out.

9. The concrete mixer shall be stopped and started with load as far as possible. In case of special circumstances, the start-up time shall be within 3S. It is strictly forbidden to start by force.

10. When removing the obstacles near the weighing table, the feeder must be raised to a proper height and the safety pin must be inserted.

11. In the process of mixing mixture, it is strictly forbidden to open the machine cover of concrete mixer.

12. In the mixing process, in case of sudden power failure, emergency measures should be taken to avoid the mixture condensation in the machine.

13. If the mixing time needs to be prolonged, and the time of the feeder's round trip is less than the mixing time, the time relay should be adjusted in time to synchronize the feeding time with the mixing time.

14. During the operation, the electrical equipment, electrical components and all parts of the circuit should be checked regularly. If abnormal sound and peculiar smell are found, the machine should be shut down immediately for inspection and treatment.

15. The power supply should be cut off when troubleshooting or handling accidents. It is strictly forbidden to carry out maintenance during the operation of the equipment.

3、 Requirements after operation

1. After daily work, cut off the power supply and lock the power switch. The equipment shall be cleaned and guaranteed according to the warranty regulations, and attention shall be paid to keep water away from electrical equipment during cleaning.

2. After cleaning, the discharge door of mixer must be opened after cleaning.

3. Operators should close the doors and windows of the control room and lock the doors of the control room before going off duty.