The invention patent began in the research project “Research on the standard device for high-voltage three-phase combined transformers†developed by Jiang Bo, an expert of Sichuan Electric Power Measurement Center of State Grid in 2007. The invention patent was declared in 2011 as a successful national invention patent in China. The invention patent is an overall detection system for the three-phase electric energy metering device of the distribution network, which solves the key technical problems of the test and analysis under the close operating conditions of the site, can restore the actual operating conditions of the site, and comprehensively detects the metering device of the distribution network, and obtains The accurate error data of the three-phase power supply system of the distribution network effectively solves the problem that only the single-phase detection and verification mode can be carried out at present, and improves the technical capability of the inspection and troubleshooting of the distribution network metering device. It is reported that the difficulty of international patent declaration in Europe and the United States is the highest in the world. The UK is a big country in Europe and the United States, and its patents are recognized by the industry. Therefore, the standards for reviewing relevant materials are particularly harsh. The invention patent was successfully applied for the national invention patent in China in 2011, and applied for the PCT patent to the International Patent Office at the end of 2011. In 2012, it obtained the international stage review conclusion issued by the International Patent Office with “newness and creativityâ€; At the national stage of the British patent, in October 2016, it was finally approved by a British expert's e-mail question, and in December 2016 it was successfully announced and authorized by the UK Intellectual Property Office. Key Type Drill Chuck ,Chuck is connected with the tool, is used to clamp the handle type tool accessories. The drill and connection with threaded connections and taper connection in two ways. Spanner Drill Chuck need pull wheel to tighten, mainly used for the machine tool industry, such as bench drill and electric drill. Spanner drill chuck as by pulling wheel to tighten the collet, and pulling wheel is a with an extension arm of bevel gear, so in the process of screwing, can play a role in increasing the torque input, so chuck clip clamping force is too large. Because chuck wrench has the advantages of simple structure, easy processing, cheap parts, reliable performance advantages, so its wider use.
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It was learned from the State Grid Sichuan Electric Power Company that the invention patent of the company's "on-site integrated detection system for three-phase energy metering system of distribution network" was authorized by the British Patent Office. The successful authorization of the British patent marks that China's overall detection technology capability in the distribution network three-phase energy metering system has reached the international leading level.
