Tongding strengthens the railway special cable market

In recent years, China's railway construction, especially high-speed rail construction, has developed rapidly. According to the adjustment plan of China ’s “Medium and Long-term Railway Network Planning”, by 2020, China will build a rapid passenger transport corridor between provincial capitals and large and medium-sized cities. Groups, Wuhan City Circle, Guanzhong Town Group, and the West Coast Strait Town Group will develop intercity rapid passenger transportation systems to cover major cities and towns in the region. The operating mileage of railways nationwide will reach more than 120,000 kilometers, basically forming a railway network with a reasonable layout, clear structure, complete functions, and smooth connections. In addition, China's urban rail transit construction is also accelerating. Currently, subway lines have been opened in Beijing, Shanghai, Guangzhou, Shenzhen and other cities. According to incomplete statistics, 25 cities across the country are carrying out preliminary work on rail transit construction. The planned mileage is more than 5000 kilometers, and the total investment is estimated to exceed 800 billion yuan. The rapid development of railway and rail transit construction has driven the demand for railway dedicated cables, and the market for railway dedicated cables has a bright future.

There are many types of railway dedicated cables. Among them, railway digital signal cables are widely used for transmission between railway signal automatic blocking systems, axle counting, station code, computer interlocking, microcomputer monitoring, dispatch centralization, dispatch supervision, high-power electric switch machines and other related signal equipment and control devices. Control information, monitoring information and electrical energy. At present, the ZPW-2000A non-insulated frequency shift automatic blocking system adopted by China's railways is an important ground basic equipment for railway transportation heavy load, safety, high speed and the main body of locomotive signals. It can realize the function of checking the entire track of the track circuit for rail breaking , A major breakthrough in technology was achieved, and there was a qualitative improvement in transmission security.

In addition, the multi-channel transponder data transmission cable is also a dedicated cable widely used in the railway industry. The transponder system is based on a single-chip microcomputer, and uses digital technology to complete data transmission, reception, and processing, and transmits the processed information to the locomotive receiving equipment or on-board ATP for train number transmission or train operation control. The transponder data transmission cable has the characteristics of large transmission signal capacity, transmission frequency bandwidth, and long transmission signal distance. The traditional transponder data transmission cable can only connect one LEU per cable, which does not meet the needs of the rapid development of high-speed railways, and it is urgent to develop a more efficient "multi-channel transponder data transmission cable".

The special use environment and technology also bring special technical requirements to railway special cables. In terms of railway signal cables, unlike ordinary cables, its structure requires special requirements such as insulated single wire, four-wire group twisting, and four-wire unit shielding, which has special requirements for manufacturing technology. In terms of multi-channel transponder data transmission cables, it is very difficult to develop such cables because there is currently no industry standard. Its manufacturing process includes the production of wire drawing extruded insulated single wire, four-wire or twisted pair, star-twisted four-wire or twisted pair shielding, cable formation, metal sheath, armor, outer sheath and other procedures. The production process of a single process is complicated, especially the manufacturing process of insulated single wire and star twisted or twisted pair shielded process is more stringent, because the diameter of the conductor and the outer diameter of the insulation directly affect the cable impedance, attenuation and other indicators. To realize the use of multi-channel transponder data transmission cables and multiple transponders, it is necessary to ensure that the crosstalk signals between the channels in the cable do not have a significant impact on signal transmission and decoding, and prevent interference between different wire groups and external interference sources. Therefore, meeting the special cables for the railway industry is a severe challenge for the cable industry in China.

Tongding Group, located in Wujiang, Jiangsu, was founded in 1999. It has 18 physical business units including holding subsidiaries, and Jiangsu Tongding Optoelectronics Co., Ltd., one of the core companies, is a listed company on the Shenzhen Stock Exchange. The Group adheres to the principle of one yuan and a moderately diversified strategic development direction. Based on the two major product production and technology research and development bases in Wujiang Zhenze “Tongding Science and Technology Industrial Park” and Wujiang High-tech Development Zone “Tongding Optical Communication Industrial Park”, it focuses on photovoltaic lines. In the field of cable manufacturing, it has established a business field that radiates the whole country and the industry scale is continuously expanding. It has a complete industrial chain covering all major categories of products from optical rods, optical fibers, optical cables, optical devices, special optical cables to optical fiber sensors and communication equipment. Able to provide domestic and foreign users with high-quality optical cable products, system solutions and technical services.

Tongding implements the strategy of revitalizing enterprises with science and technology, and has established Tongding Optoelectronics Research Institute, academician workstation, national post-doctoral scientific research workstation, national enterprise technology center, enterprise testing center, fiber optic technology joint laboratory, fiber optic sensing technology engineering center, fiber optic engineering There are more than ten R & D platforms including technology research centers, which have strong R & D capabilities.

Tongding is optimistic about the railway special cable market and has invested a lot of resources in research and development. Relying on its subsidiary Jiangsu Tongding Optoelectronic Technology Co., Ltd., Tongding has achieved good market performance in railway digital signal special cables and multi-channel transponder data transmission cables. In 2010, in the construction of the Beijing-Shanghai high-speed railway, Nanjing South Station and related projects, and the introduction of communication signal system integration projects for communications signal system control materials, the company won six packages of signal cables, and won the bid for shielded digital cables, digital signal cables, The transponder transmits more than 1,000 kilometers of cables, etc. The cable production is strictly in accordance with the technological process and cable characteristics, which greatly improves the punctuality of the Beijing-Shanghai high-speed train and the safety of driving. In Suzhou Metro Line 1, various signal cables, axle counting cables, and transponder transmission cables were provided for a total of more than 600 kilometers in accordance with the requirements of the iron standard. On the basis of the new cable transmission system, the cable insulation performance was also greatly improved. Safer operation has increased guarantees. As for the multi-channel transponder data transmission cable, the multi-channel transponder data transmission cable developed by Tongding has been put into use in the Beijing EMU. As a professional manufacturer of railway signal cables, Jiangsu Tongding Optoelectronics Technology Co., Ltd. has advanced production equipment, testing equipment and technical research and development capabilities, and will contribute its own strength to the development of China's railways.