Briefly Describe The Market Development Trend Of Power Fittings
overhead line fittings Industry experts pointed out that the future development trend of distribution line hardware products will mainly focus on energy-saving hardware products for power transmission and distribution lines above 500KV. Such as: aluminum alloy suspension wire clamps, pre-twisted power hardware, damping spacers, equalizing rings, energy-saving shock-proof hammers and new non-magnetic materials instead of ferromagnetic materials to manufacture ordinary hardware energy-saving. All overhead line connectors enterprises can only continuously increase equipment investment, adopt advanced technology, improve product quality and enhance market competitiveness.
overhead line hardware Since the implementation of product production licenses, there are more than 210 licensed enterprises, including 3 foreign-funded enterprises, with a total of more than 410 product units. Manufacturers are distributed throughout the country, with the largest number in Jiangsu and Zhejiang provinces, accounting for more than 1/3 of the total. The product units and varieties of enterprises are different, and the production scale varies greatly, with annual output value ranging from several million to hundreds of millions. At present, there are about 30 enterprises with the qualification to produce 500KV power transmission and transformation fittings, 15 enterprises producing 750KV power transmission and transformation fittings, and 11 enterprises producing 1000KV UHV power transmission and transformation fittings; these enterprises have strong production capacity and high management level, and are in the leading position of the current overhead power line connectors.
The number of product units obtained by the certified enterprises varies. There are more than 50 enterprises that have obtained 4 product units. Enterprises with the qualification to produce 500KV and above line fittings basically have 4 product unit certificates; most of the enterprises with 3 or 2 product units do not produce malleable cast iron products for environmental reasons, and most of the enterprises with 1 product unit are malleable cast iron products and pre-twisted fittings. Pre-twisted fittings are mainly OPGW and ADSS optical cable matching. There are more than a dozen manufacturers such as PLP. Enterprises with 1 product unit only produce shock-proof hammers or insulated wire matching fittings. Such enterprises are generally not very large.
During the 11th Five-Year Plan period, the State Grid Corporation of China and China Southern Power Grid Corporation invested more than 1.4 trillion yuan in power grids, and the State Grid Corporation's 1000KV Nanyang-Jingmen UHV DC is under construction. The development of power construction has promoted the continuous increase in investment in equipment and the development of new products by production enterprises. For example, die-casting technology is used for cast aluminum, and the surface is shot peened. The material is also expanded from ZL102 to ZL104 and 101A, which improves the strength and appearance quality of aluminum castings. Each overhead power line hardware enterprise has added large-scale equipment such as 800, 1000, and 1250-ton high-pressure die-casting machines, 630 and 1000-ton friction presses, medium-frequency heating equipment, CXE CNC cutting machines, CNC pipe bending machines, and 1000KN horizontal tensile machines to the processing equipment, greatly improving the production and testing capabilities of the enterprises.
