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Nanjing Electric Power Fittings Manufacturer
Power fittings are metal accessories that connect and combine various devices in the power system, transfer machinery, electrical loads, and play a protective role. They play an important role in power transmission and transformation projects. Product quality is not only related to the safe operation of the power grid, but also to the safety of personal property. As early as 1986, the relevant departments of the State Council incorporated electric power fitting products into the production license management. Electric power fittings production license units are divided into malleable cast iron, forging, aluminum copper aluminum, and cast iron. According to the role played by the product, it is usually divided into 9 categories, such as suspension clamps, tension clamps, connection fittings, connection fittings, protection fittings, pull fittings, equipment clips, T-type clips, and fixed fittings. Power transmission projects of various voltage levels.
Since the implementation of product production licenses for electric power fittings, there are currently more than 210 certificated enterprises, including three foreign-funded enterprises with a total of more than 410 product units. Manufacturers are distributed all over the country, of which Jiangsu and Zhejiang provinces are the largest, accounting for more than 1/3 of the total. Enterprise product units are different, varieties are different, production scales are very different, and the annual output value ranges from several million to several hundred million. At present, there are about 30 companies with 500KV transmission and transformation fittings production qualifications, 15 companies producing 750KV transmission and transformation fittings, and 11 companies producing 1000KV UHV transmission and transformation fittings; these companies have strong production capacity And higher management level, is in the leading position of current power fittings.
The number of product units obtained by certification companies varies. More than 50 companies have obtained 4 product units. Enterprises with 500KV and above line hardware production qualifications basically have 4 product unit certificates; those with 3 or 2 product units Most of the enterprises do not produce malleable cast iron products for environmental reasons, and most of the enterprises in one product unit are malleable cast iron products and pre-twisted metal fittings. Pre-twisted metal fittings are mainly equipped with OPGW and ADSS optical cables. There are currently dozens of manufacturers such as PLP. One product unit company also only produces shock-resistant hammers or insulated wire supporting hardware. Such enterprises are generally not large in scale.
During the "Eleventh Five-Year Plan" period, State Grid Corporation of China and China Southern Power Grid Corporation invested more than 1.4 trillion yuan in power grids, and 1000KV Nanyang-Jingmen UHV DC of State Grid Corporation is under construction. The development of electric power construction has promoted the continuous increase of investment in equipment and the development of new products by manufacturing enterprises. For example, cast aluminum uses die-casting technology and surface shot peening, and the material is also expanded from ZL102 to ZL104, 101A, which improves the strength and appearance quality of aluminum castings. Various electric power equipment companies have added 800, 1000, 1250 tons of high-pressure die-casting machines, 630, 1000 tons of friction presses, intermediate frequency heating equipment, CXE CNC cutting machines, CNC pipe bending machines, 1000KN horizontal tensile machines, etc. Equipment, enterprise production and testing capabilities have been greatly improved.
专家 The experts of the power fittings industry pointed out that the future development trend of power fittings products is mainly on energy-saving fittings for transmission and distribution lines and distribution lines above 500KV. Such as: aluminum alloy suspension clamps, pre-twisted power fittings, damping spacers, pressure equalizing rings, energy-saving shock-proof hammers and new non-magnetic materials instead of ferromagnetic materials to manufacture common hardware with energy saving. All electric power fittings companies have only continuously increased equipment investment, adopted advanced technology, improved product quality, and enhanced market competitiveness.
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Copyright © 2019 Jiangsu Manlong Technology Co., Ltd.