"Cracks can be seen on the surface of this umbrella skirt with the naked eye. We can use a macro microscope to observe it under different magnifications to check whether there are cracks on the surface of the umbrella skirt below...", February 23, on the State Grid The technicians in the electron microscope laboratory of the Material Testing and Failure Analysis Laboratory of Gansu Electric Power Research Institute are orderly and dedicatedly carrying out surface microscope observations for the sheds of 33 composite insulators submitted for inspection by the State Grid Jiuquan Power Supply Company and other local companies. Composite insulators carry out a comprehensive "physical examination", so that every existing hidden danger is exposed in advance for timely rectification.
In order to do a good job in the testing and analysis of composite insulators for power grid transmission lines, and to identify the defects and hidden dangers of in-service equipment materials, the State Grid Gansu Electric Power Research Institute deeply taps the potential of the material profession, consults relevant testing technologies and processes and other materials, and uses keen knowledge. Observation and skilled analysis techniques are used to conduct a comprehensive test and inspection of the shed and mandrel of each composite insulator.
In this sampling inspection of composite insulators in service, there are more than 20 inspection items, including physical and chemical inspections and non-destructive inspections such as insulation properties and mechanical properties. In the test work, the number of composite insulators involved is huge, but the technicians carry out various experimental tests one by one with a rigorous attitude and professional methods, and analyze the potential safety hazards of equipment materials. "When we remove the umbrella skirt, we try to cut the area close to the sheath as clean as possible to facilitate subsequent removal of the sheath with a lathe" "After removing the umbrella skirt, we must clearly mark the number on the umbrella skirt and mandrel to avoid confusion. , it is difficult to distinguish and it is difficult to match”, the material expertise reminded each other during the pre-processing process.
In the test and testing, the materials major of the State Grid Gansu Electric Power Research Institute gave full play to the intellectual advantages of talents and gathered the strength of young employees. When carrying out concentricity testing, technicians are all "pathfinders". In order to remove the depth of field, they boldly innovate, try to use grinding, machining and other methods, have the courage to practice, constantly summarize, and create new methods such as composite insulator concentricity testing. new way. In the continuous exploration, we overcome various difficulties and improve the detection skills of the material professional for composite insulators. Strive to become a "wisdom star" and a "technical leader" in the diagnosis and analysis of power equipment defects.
In the support work, the technicians strive for perfection, whether in machining such as removal of umbrella skirts or in test analysis such as hardness testing, to search for rules based on every scientific and accurate hardness data and topographical pictures. , analyze possible defects and hidden dangers, and control the quality of transmission line equipment in the province.
In the next step, the technicians of the State Grid Gansu Electric Power Research Institute will strengthen the exploration of new technologies and methods for power grid equipment and materials testing, continuously improve the overall technical level of power grid equipment testing and testing, strictly control the quality, and provide power transmission and transformation equipment for the power grid in Gansu. Safe and reliable power supply contributes to the power of materials.