"At that time, my main job was to carry the toolbox for foreign experts," said Li with a smile, which also gave him the opportunity to observe the process of assembling and debugging machines by foreign experts. When the project was over and the foreign experts left, Li Gang would work with his co-workers on the drawings to disassemble and install the shield machine, repair and reassemble the various components, and do everything possible to extend the service life of the shield machine. "At that time an imported shield machine came in hundreds of millions at a time and we protected it like eyeballs." Li Gang said that due to proper maintenance and repair, the two TBMs assumed the task of constructing three railway lines in China. In 2003, Li Gang transferred from the China Railway Tunnel Bureau repair shop shield manufacturing company, coincides with the "shield machine simulation experiment platform" national "863" plan just settled shield manufacturing company. "Shielding Machine Simulation Experiment Platform" is the starting plan for making China-made shield machine. Starting from the drawings, Li Gang combed the trend of each system and each cable and used it for 5 years to become familiar with the whole process. In 2007, "Shield Machine Simulation Experiment Platform" was checked and accepted by the expert review team of "863" project and Li Gang was involved in the manufacture of the first domestic shield machine, which is responsible for the electrical system of this shield machine. In 2008 the first domestic-made shield machine went off-line smoothly and was used for the construction of Tianjin Subway. It was also the first time that a domestic-made shield machine was used for "actual combat" and was well received by construction parties and owners. Today, China Railway TBG has become the largest and second largest tunnel equipment supplier in the country. Its products are exported to 9 countries and regions overseas. Li Gang is the electrical system trader for these devices. Electrical system "attending physician" Shield machine as the king of construction machinery, electrical system complexity is self-evident, a machine has thousands of cables, hundreds of directions, tens of thousands of nodes, called the most engineering machinery and equipment. Thousands of cables, tens of thousands of nodes are the "blood vessels" of the equipment, and Li Gang is the "attending physician" who gets through these "blood vessels." Every day in the workshop, I have to connect at least 10,000 electric wires, To ensure correct, in order to control the quality of products from the source. "Li Gang said. In more than 20 years of work practice, Li Gang has practiced a set of skills that "look and smell". There was a dilemma in the factory commissioning of China Railway 37 Shield Project - the drive cabinets to be used for commissioning were still on site. However, in order to have a thorough understanding of the maintenance of the equipment, the customer demanded to debug in the factory and drive the cabinets Back and forth transport will be more than 10 days, greatly delay the construction period; if debugging in the factory, shield machine required voltage and workshop voltage does not match. Faced with this issue, Li Gang use the existing workshop frequency counter, through sophisticated data calculations, put forward 275kw motor in 400V, 29Hz buck under the conditions of use of the program to solve the problem but also to achieve the motor buck Successful application of electrical industry at home and abroad. Much has happened in such a case, where he is revered as "electrical authority" by workshop workers. China Railway 188 TBM is a new project. The cable is completely different from the conventional shield. As the first batch of hard rock roadheader in China, Li Gang led the electrical shop colleague, checked the data and set the program, and proved the experiment Warping problems. The same is China Railway No. 188, how to improve the accuracy of the sensor sensor belt measurement, he proposed to optimize the sensor position, the sensor tube card is fixed on the belt roller, the roller and the sensor as a whole, After optimization, the relative positions of the sensor and its sensing point and the roller will not change, and meanwhile, the accuracy of the sensor is also extended, and the service life of the sensor is prolonged. Today, Li Gang is busy researching and developing "frequency conversion system" localization. "The name of this project is the research and application of frequency conversion cabinet integration technology. The frequency conversion system is the core driver of the shield machine. Once the development is successful, it can save hundreds of thousands of yuan for each product with domestic substitution, Save tens of millions of funds. "Li Gang said that the current finished product has been taken out and will be installed on a trial shield machine," I have confidence in my product, there will be no problem. "
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