1. The purpose of maintenance is to improve the integrity rate of equipment and increase the service life of equipment

       2, maintenance measures daily maintenance

       3. Carry out patrol inspection of the equipment to find out the problems in the equipment in time. The inspection content is carried out in accordance with the shield machine inspection table. 2. The equipment is cleaned, tightened, lubricated, adjusted, and anti-corrosive to prevent malfunctions. Clean, clean the motor, valve, power distribution cabinet, etc. Tighten, lubricate the places where the structure is loose, pipeline leaks, one is to check whether the lubrication system is normal, the other is to manually lubricate and adjust the parts that need manual lubrication, and adjust and rectify the unreasonable places of the shield machine. Anti-corrosion, prevent the electrical hydraulic components of the shield machine from corrosion

       4. According to the established plan and maintenance content, carry out monthly warranty, quarterly warranty, and annual warranty on the equipment. 2. Plan a comprehensive inspection of the equipment, evaluate its condition, and make maintenance content accordingly.

       Intermittent monitoring The temperature, pressure, oil, current, vibration and other conditions of the equipment are monitored with the help of auxiliary tools, and the equipment can not be detected by the human senses in time.

       5. Shield machine failure classification, mechanical failure, tool wear, belt deviation, hydraulic failure, valve core jam, plugging of the core, pipeline leakage, pipeline closure, electrical failure, emergency stop is pressed, the connection is pulled off ( VMT), sensor damage, loose wiring, water in the junction box, electrical hidden fault (reset just fine), electrical interlock, overload trip, component damage

       6. ​​Troubleshooting When a failure occurs suddenly during tunneling: first turn off the screw machine, close the screw machine cabin door, and then deal with it according to the specific failure situation. Judge the cause of the failure according to the Plc failure prompt and failure phenomenon. Therefore, first ask about the phenomenon and check the PLC fault prompt before handling the fault. Common faults can be directly dealt with based on experience to determine the most likely cause, while complex faults need to be gradually reduced based on the phenomenon.