Application of thermal imaging camera in railway industry

At present, there are three types of train traction in my country: steam locomotive traction, diesel locomotive traction and electric locomotive. Among them, railways that use electric locomotives to traction trains are called electrified railways. Electric traction has the characteristics of large horsepower, fast speed, low energy consumption, and high efficiency. The transportation capacity of the electric traction section is significantly improved, and the transportation cost is greatly reduced. At the same time, the performance and working conditions of the locomotive are better than that of the diesel locomotive. It is the future development direction of my country's railway traction power.　　 The widespread use of electric locomotives has also led to more and more equipment on the railway system. In this way, how to effectively detect electrical or mechanical equipment has become an important issue at present.　　 Now the infrared thermal imaging camera can accomplish this, and the state can be overhauled in a short time without stopping the machine. Using Ti infrared thermal imaging camera to replace the regular cleaning and fastening work in traditional maintenance can save 50%-90% of the cost and effectively prevent the occurrence of fires. Whether it is new or old equipment, you can benefit from the thermal imaging camera inspection. For example, all electrical equipment and power distribution systems, including high-voltage contactors, fuse panels, main power circuit breaker panels, contactors, and all power distribution lines, motors, transformers, etc., should be inspected by infrared thermal imaging to ensure all operations The electrical equipment has no latent heat hazard, which effectively prevents the occurrence of fires and unexpected shutdowns.　　　　 Below are some facilities that need to be inspected by thermal imaging cameras.　　 1. Various electrical devices: It can be found that the joints are loose or poorly contacted, unbalanced load, overload, overheating and other hidden dangers. The potential effects that these hidden dangers may cause are arc, short circuit, burnout, and fire. Their average repair cost is 10,000 to 50,000 yuan; replacement requires 80,000 to 100,000 yuan, and the construction period is several weeks to several months.　　　　　　 2. Transformer: It can be found that there are hidden problems such as loose joints, overheating of the bushing, poor contact (tap changer), overload, unbalanced three-phase load, and poor blockage of the cooling pipe. Its effects are arc, short circuit, burnout, and fire. The cost of rewinding is tens of thousands of yuan, and the replacement is hundreds of thousands. The construction period is several weeks or months.　　　　　　3. Motors and generators: The hidden dangers that can be found are excessive bearing temperature, unbalanced load, short-circuit or open windings, heating of carbon brushes, slip rings and collector rings, overload and overheating, and blockage of cooling pipelines. The impact is that faulty bearings can cause damage to the iron core or winding ring, and faulty carbon brushes can damage the slip ring and collector ring, and then damage the winding coil. It may also cause damage to the drive target. It takes tens of thousands of yuan to rewind the coil (5000 horsepower) of the motor, and hundreds of thousands of yuan to replace it. The construction period is several weeks to several months.　　　　　　 4. Various transmission equipment, such as transmission, traction machinery, etc.　　　　　　 For all devices that can be directly seen, infrared thermal imaging cameras can determine the thermal hazards of all connection points. For those parts that cannot be seen directly due to shielding, you can find the hidden heat hazards according to the heat conduction to the outside parts. Comparison: In the traditional method, there is no other way to test the operation of circuit breakers, conductors, bus bars and other components except for physical inspection and cleaning of the joints.　　　　 In addition, the use of infrared thermal imaging cameras instead of traditional cleaning and fastening methods can save a lot of money. There are two reasons for this saving: 　　1 First, the thermal imaging camera inspection is carried out very quickly, instead of spending a lot of manpower to clean and tighten the equipment like the traditional method. 2 In addition, when the infrared camera inspection is in progress, the equipment is not required to be powered off, but only after the hidden dangers are found, and the short-term power failures are required for repairs. 　　 3 And the power failures for repairing individual hidden dangers are only partial, and the power failure time is very long. Limited, it may even be scheduled to be repaired during the planned power outage. Attachment: Application of infrared thermal imaging camera in railway system: main engine of internal combustion/electric locomotive; traction motor; heat exchanger; intercooler ventilator; air filter; main engine of battery electric locomotive parts; traction motor; rectifier device ; Auxiliary power unit; power supply system and components; brake shoe of locomotive and rolling stock; gear box; brake cylinder; bearing; car body; axle box; buffer insulation car, refrigerated container air conditioning unit, refrigeration equipment railway communication signal equipment locomotive Pantograph electrical cabinet driver controller electric pneumatic contactor AC and DC contactor position switch electronic control cabinet machine control cabinet power supply screen cabinet converter