Briefly Describe The Development Trend Of Power Fittings In The Future
Hardware Powerfitting 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 Jiangsu and Zhejiang provinces having the largest number, 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 values ranging from several million to hundreds of millions. At present, there are about 30 enterprises with 500KV power transmission and transformation fittings production qualifications, 15 enterprises producing 750KV power transmission and transformation fittings, and 11 enterprises producing 1000KV ultra-high voltage power transmission and transformation fittings; these enterprises have strong production capacity and high management level, and are in the leading position of current power fittings.
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 produce malleable cast iron products and pre-twisted fittings. Pre-twisted fittings are mainly used to match OPGW and ADSS optical cables. 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 in scale.
During the "Eleventh Five-Year Plan" period, the State Grid Corporation of China and the Southern Grid Corporation invested more than 1.4 trillion yuan in the power grid, 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 by production enterprises and the development of new products. For example, cast aluminum adopts die-casting technology, surface shot peening, and the material is also expanded from ZL102 to ZL104 and 101A, which improves the strength and appearance quality of aluminum castings. Power fittings enterprises have added 800, 1000, 1250 ton high-pressure die-casting machines, 630, 1000 ton friction presses, medium frequency heating equipment, CXE CNC cutting machines, CNC pipe bending machines, 1000KN horizontal tensile machines and other large equipment to their processing equipment, greatly improving the production and testing capabilities of enterprises.
Experts in the power fittings industry pointed out that the future development trend of power fittings products will mainly focus on energy-saving fittings for power transmission and distribution lines above 500KV. Such as: aluminum alloy suspension wire clamps, pre-twisted power fittings, damping spacers, equalizing rings, energy-saving shock-proof hammers and new non-magnetic materials instead of ferromagnetic materials to manufacture ordinary fittings for energy saving. Power fittings enterprises can only continuously increase equipment investment, adopt advanced technology, improve product quality and enhance market competitiveness.
