Hebei Chief Technician Chutian Famous Craftsman Sun Hongjie
Sun Hongjie, born in May 1973, is a member of the Communist Party of China. He graduated from our school in 1992 majoring in railway power supply. He currently holds a bachelor's degree and is a first-level maintenance electrician. He is currently the chief technician of the power supply department of the Mechanical and Electrical Department of Wuhan Metro Operation Co., Ltd. He enjoys special allowances from the State Council and has successively won the title of National Technical Expert, Hubei Craftsman, Hubei Province Chief Technician, Hubei Province Chutian Famous Craftsman, and National City He won the title of Maintenance Expert in the "Five to Five" labor competition of rail transit, and the studio he led was awarded the title of National Skills Master Studio.
1. Excellent skills and abide by the responsibility of "guaranteeing electricity".
In recent years, Wuhan's subway network has developed by leaps and bounds, from one new line opening every year to two to three new lines every year. Sun Hongjie draws on the concept of "preventive medicine to treat diseases" , pioneering the establishment of a Wuhan subway power supply test class. In 9 major urban rail transit construction projects, we organized preventive tests on 6,495 pieces of equipment in 384 substations in 8 major projects and nearly 100 minor projects. We used massive data analysis to predict failures and carry out preventive tests. Inspection and maintenance has eliminated safety hazards, solved 6 major system hazards, and handled 40 major faults in a timely manner to ensure the safe and stable operation of the power supply system, making outstanding contributions to the sound and rapid development and ultra-large network operation of Wuhan Metro. .
In the major technical transformation work of Wuhan subway power supply, he bravely shouldered heavy responsibilities and took responsibility. In 2016, he led the team to successfully complete the first phase 10kV protection device and power monitoring system renovation project of Wuhan Metro Line 1 with high quality and efficiency one month ahead of schedule. In 2018, Sun Hongjie once again faced the difficulties and was responsible for the transformation of the 750V DC traction power supply system of the first phase of Wuhan Metro Line 1. From 2019 to 2021, Sun Hongjie bravely took on the important task of transformation and independently completed the transformation of the 400V frame circuit breaker and PLC of Line 1. In the harsh situation of heavy tasks, tight construction schedules, many interfaces, and cross-operation between renovation equipment and operating equipment at the construction site, he proposed the "Four Reverse Connection Method" construction method, established six categories and sixteen items of ledgers, and pioneered the "Ten Dynamic Environment "Construction method, implement dynamic process control, and greatly improve work efficiency. The renovation project achieved "zero errors, zero hidden dangers, and zero accidents" and completed the main part of the project one month ahead of schedule, creating the miracle of the shortest renovation time for similar equipment in China.
2. Face difficulties and strive to improve operational quality.
In the Wuhan Metro Line 1 10kV protection device internal board circuit transformation project, Sun Hongjie overcame the difficulties of merchants’ dual monopoly on technology and supply, led the technical team to overcome the difficulties, and repeatedly studied the faulty board and After many attempts, the transformation of the board circuit and the safety demonstration were successfully completed, ensuring the normal operation of the equipment and achieving a significant reduction in costs. This single item alone saved the company more than 500,000 yuan in production.
Aiming at the problem that the original DC switchgear current incremental protection (DDL protection) test instrument only tests qualitatively but not quantitatively, in order to more accurately simulate actual faults and improve the accuracy of protection, Sun Hongjie refused to blindly follow and work hard. He studied and independently transformed test instruments to enable quantitative calibration functions, and provided technical guidance to manufacturers without reservation to promote the transformation and upgrading of test equipment. Under his guidance, the equipment achieved large-scale mass production and promoted the industry The DDL protection test function has been improved to a new level.
As the golden line of Wuhan Metro transportation, Line 2 has a transportation capacity bottleneck. In order to overcome this technical difficulty, Sun Hongjie spent more than a month and passed 44 high-current tests to determine the power supply capacity and protection settings of the switch cabinet. , equipment performance and other aspects, to form a set of protection setting and test experience that can be used for reference and promotion, to provide power supply quality guarantee for Line 2’s “increased traffic density and shortened traffic interval”. This result provides a scientific and feasible experimental experience basis for improving the transportation capacity of the entire network, and provides a guarantee basis for guiding and promoting the further improvement and optimization of Wuhan subway transportation capacity, making it convenient for passengers to travel and benefiting the general public.
3. Innovate and create efficiency, and create a project “incubator”.
As an important piece of equipment in the Wuhan subway traction power supply system, the contact rail directly affects the subway power supply system and even the safe operation of the entire subway. In response to an accident in a foreign city due to a contact rail failure that led to a two-day subway outage, Sun Hongjie took precautions and conducted extensive research with the research team to determine and develop a temporary contact rail support base plan and draw a design, trial-produced a contact rail emergency repair base sample, and invented a completely independent The "Contact Rail Temporary Support Base", the core technology of intellectual property rights, has obtained the national utility model patent certificate. This patented product is the first in the country. Currently, Wuhan Metro has produced 149 sets and has been promoted to the entire network. It can not only greatly shorten the contact rail failure The emergency repair time satisfies Wuhan Metro’s need for emergency repair of contact rails, and provides reference and practical application basis for emergency repair work of contact rails in subways in other cities, further improving the level of emergency repair of contact rails in urban rail transit across the country.
Sun Hongjie led the Skill Master Studio team to carry out the innovative project "New 750V Grounding Wire Rail End Clamp" and obtained the national utility model patent invention, which greatly improved operating efficiency, reduced contact resistance and ensured operating safety.
At the same time, in order to quickly detect and display the vertical and horizontal parameters of the contact rail, Sun Hongjie guided the studio team to carry out the innovative project of "Electronic Detection Vehicle for Contact Rail Parameters" and obtained the national utility model patent. This product is the first in the country to continuously measure the operating data of the contact rail. It greatly improved work efficiency and won the Outstanding Project Award in the second Wuhan "Gongyou Cup" Innovation and Entrepreneurship Competition.
The safety and reliability of subway DC system equipment are the basic conditions for ensuring the safe operation of the subway. In order to quickly and accurately find the DC switch cabinet control fault loop, Sun Hongjie summarized the Wuhan subway DC circuit breaker failure experience and wrote a PLC Diagnostic program, the "DC circuit breaker loop fault automatic detector" was developed. The product can quickly and automatically detect 181 terminals and 216 wires within 1 minute, achieving precise location of loop faults and greatly improving the efficiency of troubleshooting. At the same time, he took the lead in co-designing and producing the national utility model patented product with the studio's environmental control technology team - "Integrated descaling and passivation machine for heat exchangers", which has obvious cleaning capabilities and energy-saving effects. In 2020, Wuhan Metro Lines 2, 3, 4, and 7 will save approximately 1 million kilowatt hours of electricity.
The Skills Master Studio led by Sun Hongjie won the title of "National Skills Master Studio". The studio has carried out 27 innovative projects, 18 innovative achievements, 5 achievement transformations, and 4 patents. Won 1 provincial innovation project award and 2 municipal innovation project awards.
4. Teach by words and deeds, and convey the positive energy of role models.
As a mentor of the company’s new apprenticeship system, Sun Hongjie continues to learn the cutting-edge technology of rail transit power supply equipment and summarizes new skills in equipment maintenance in the industry. He organizes personnel to conduct various maintenance procedures and maintenance procedures in the power supply profession. The training materials have been comprehensively sorted out to form a total of more than 100,000 words of text material. Based on the requirements of "craftsmen", we carry out apprenticeship training through a systematic, professional, customized and project-based mechanism. Currently, we have trained 845 apprentices, of whom 58 have become technical backbones and have obtained honors above the municipal level. There are 15 people. Relying on the theory and practical training platform of the company's education and training center to carry out advanced apprenticeship training, teach professional knowledge and operational skills to apprentices, use the special equipment and project research and development of the Skill Master Studio to carry out elite apprenticeship training, and bring the industry's cutting-edge Research is passed on to apprentices. During the 2020 COVID-19 epidemic, Sun Hongjie, with a high sense of responsibility and mission, stayed on the front line of ensuring power supply and working on the front line of the community. He used "precepts and deeds" to drive apprentices to participate in the fight against the epidemic, and used practical actions to demonstrate the skills of craftsmen at the moment of fighting the "epidemic". Professionalism. When there was a severe rainstorm in Zhengzhou, Henan Province in 2021, he took the initiative to sign up for the expedition and went to the Zhengzhou Metro front-line site to participate in emergency repair work, passing on a strong role model to young employees with practical actions.