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1. Purpose: Inspection is a fundamental system in workshop equipment management. Its purpose is to accurately assess the technical condition of equipment through inspections, maintain and improve its operational performance, prevent accidents, reduce downtime, extend the equipment’s lifespan, lower maintenance costs, and ensure normal production. 2. Scope: These procedures apply to the maintenance equipment under the jurisdiction of the Mechanical Power Department, where a system of regular inspections and scheduled repairs by all staff is implemented. 3. Inspection Implementation 3.1 Based on the classification of equipment, establish detailed inspection schedules and inspection contents. 3.2 Determine the waste discharge cycle, lubrication cycle, lubrication points, and types of grease to be used based on the classification of the equipment. 3.3 Establish equipment cleaning schedules and cleaning standards. 3.4 Record in detail the locations and operating conditions of the equipment that is under inspection; for any abnormalities detected, document the fault details, the process taken to address them, as well as the model, type, and quantity of components replaced. 3.5 Ensure that all inspection and testing tools are carried. 3.6 Address the issues identified during inspections promptly; for those that cannot be resolved, report them immediately. 3.7 In addition to keeping inspection records, daily maintenance work should also be documented in detail. 4. Inspection contents and frequency 4.1 Common inspection contents: 4.1.1 Inspect the equipment within the designated area, review the production records related to the respective positions, exchange information with the personnel on duty, collect data on the equipment’s operating conditions and analyze them in order to determine the degree of degradation of the components. 4.1.2 Based on the inspection results, propose suggestions for preventing issues and improving equipment performance. 4.2 Instrumentation section: 4.2.1 Inspection of on-site instruments: (once daily) (1) The instruments must be maintained in their proper installed position, both vertically and horizontally. (2) The appearance must be in good condition, clean, and fully equipped with license plates. (3) The instrument leads should be kept neat, secure, without any loosening or exposed wires. (4) The pressure guide tube maintains its installed position, with no blockages, leaks, or twisting. 4.2.2 Inspection of on-site pipelines: (once daily) (1) The pipelines must maintain their installed orientation, being both vertical and horizontal. (2) The cable trays and conduits are not dragged or suspended; the wires are not exposed, and the cover plates of the cable trays are complete and in good condition. (3) Check for blockages, leaks, or seepages in the pipelines, connectors, air supply, and insulation. (4) The valve must be in good condition, capable of opening and closing smoothly and reliably, with complete handwheels and no bending in the screw rod. 4.2.3 Inspection of indoor panel instruments: (once daily) (1) The appearance is intact, the identification tags are complete, and there are no defects in the components. (2) Keep the inside and outside of the instrument clean. (3) The display is accurate, the lines are clearly drawn, and the button switches are flexible and reliable. (4) The quality of the automatic control system must be maintained at a high level. 4.2.4 Inspection of post-disk wiring: (once daily) (1) The wiring is neat and in order, with terminals securely connected and good contact. (2) Modified lines and temporary lines should be placed in conduit slots to ensure compliance with standards. (3) The lighting should be good. 4.2.5 Inspection of the power supply: (once daily) (1) The power cable should be free of damage or exposure, with good insulation. (2) The protective covers are complete and undamaged. (3) A symbol is required for 24VDC, with normal current. 4.2.6 Inspection of actuators and control valves: (once daily) (1) The actuators and control valves shall be kept in good working condition. (2) The connecting rods and adjustment rods are free of bending, and the screws are not loose. (3) The moving parts are well lubricated. 4.3 PLC (Computer) Section 4.3.1 Inspection of on-site pipelines: (once daily) (1) The pipelines must be maintained in their proper installed position, both vertically and horizontally. (2) The cable trays and conduits are not dragged or suspended; the wires are not exposed, and the cover plates of the cable trays are complete and in good condition. 4.3.2 Inspection of indoor control cabinets and panels: (once daily) (1) The appearance is intact, all labels are present, and there are no defects in the components. (2) The indicator gauge shows accurately, the button switches are flexible and reliable, and other components are in good condition. (3) The wiring is neat and standardized, with the terminal connections being firm and reliable. (4) Well-lit. (5) The auxiliary equipment is complete and in good condition. (6) Clean the interior and exterior of the equipment inside the tray. 4.3.3 Inspection of the power supply system: (once daily) (1) The parameters of the UPS interference-resistant power supply and other power supply systems are normal, the systems operate stably, and the switching function is reliable. A discharge check is performed every six months. (2) The power cable is free of damage or exposure, with good insulation. (3) It is properly grounded, not loose, and does not make contact with other metals. (4) The backup equipment is in good condition. 4.3.4 Inspection of the refrigeration system: (once daily) (1) The refrigeration system is operating normally, with no fault alerts. (2) The indoor temperature and humidity meet the requirements. (3) The fans inside the cabinet and chassis are operating normally, with no abnormal noises, and there are no over-temperature alarms from the equipment. (4) The backup equipment is in good condition. 4.3.5 Inspection of the PLC system cabinet (terminal cabinet): (once daily) (1) The system power is normal. (2) The CPU and I/O templates are operating normally, with no fault alarm indications. (3) The system bus is operating normally, with proper communication, etc. 4.3.6 Inspection of the operation station: (once daily) (1) The system is powered properly. (2) Network communication is functioning normally. (3) Check the interlock, alarm adjustment, and display parameters, as well as whether the quality of the control circuits is good. (4) Check the information record sheet to understand the equipment operation status and system alarm conditions during the inspection cycle. 4.3.7 Inspection of the inverter: (once daily) (1) Check the information displayed on the inverter. (2) Inverter power supply system. (3) Are the wiring terminals of the inverter loose or abnormal? 4.3.8 Inspection of communication equipment: (once daily) (1) The specifications for the overhead communication cables are met. (2) The wiring is in good condition, with no exposed parts and excellent insulation. (3) The lightning protection facilities and grounding wires meet the requirements. (4) Regularly check the usage of the user’s phone, with the user’s signature for approval. 4.4 Low-voltage electrical system: 4.4.1 Inspection of the locomotive power supply system: (Inspected twice a week) (1) Check whether there is any deformation in the collectors of each locomotive (including the brushes), whether the bolts and pins in various parts are in good condition, and assess the wear level of the brush blocks. (2) Check whether the grinding channels and sliding wires are in good condition, and whether there is any deformation, cracking, or shortage in the porcelain insulators, pressure plates, connecting plates, and expansion joint transitions. 4.4.2 Inspection of the power supply system in the distribution room and electrical room: (once a week) (1) Check whether the busbars, knife switches, and circuit breakers are hot; whether the contacts are properly closed; and whether the mechanical mechanisms for opening and closing operate smoothly and reliably. (2) Check whether the instrument is in good condition, whether the indications are normal, and whether there is any looseness or open circuits in the secondary wiring. (3) Whether the nameplates of each electrical component are intact. 4.4.3 Inspection of components inside distribution cabinets and boxes: (once a week) (1) Check whether the contacts of electrical devices such as air switches, contactors, and relays are properly closed, whether there are any abnormal noises, and whether the wiring is overheating. (2) Check whether there is any looseness or short circuit in the connections of each terminal. (3) Check for dust and debris inside and on top of the cabinet.