In the past two years, nuclear valve manufacturers have made progress in the research and development of key nuclear valves jointly with the China General Nuclear Power Group and China National Nuclear Corporation. According to the current bidding conditions for the Qinshan and Hongyanhe projects, combined with the existing capacity and performance of the valve industry, the localization rate of the valves for Hongyanhe No. 1 and No. 2 units will reach about 35%; after another 1 to 2 years, the research will be completed. R & D, nuclear valve manufacturing will have a major breakthrough, in the Hongyanhe 3, 4 units on the localization rate is expected to achieve 60%.
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With the successful development of the nuclear valve, it indicates that some products in China's valve industry have entered the high-end field, reflecting that China's valves have reached a certain level of manufacturing. The product has a broad market space and also provides new opportunities for the development of the valve industry. China Guangdong Nuclear Power Co., Ltd. and China Nuclear Suval Valve Co., Ltd., Dalian Dagao Valve and Jiangsu Shentong Valve signed the Cooperation Agreement on the Development of Nuclear Power Valve Localization, marking that the joint development of nuclear valves by China Guangdong Nuclear Power Group and domestic valve companies has been fully started.
Localization of high-end valves The rapid development of high-end valves In the year before, the 5-meter large-diameter vacuum butterfly valve independently developed by Jiangnan Valve Company and undergoing hundreds of experiments was put into production. The first domestic valve entered the large-scale national defense wind tunnel test. Two-way vacuum sealed butterfly valves and special pressure regulating valves were provided for the test device, which contributed to important contributions. In 2005, the company successfully developed the world's first zero-leakage "adjustable metal seal butterfly valve" to replace the gate valves and globe valves that consume more energy and material, and successfully developed the shut-off time well below the international standard of 0.5 seconds. Electro-hydraulic linkage quick-closing valve "made high-end valves.
China Nuclear Suval Valve and Suzhou High and Medium Pressure Valves and Lanzhou High-pressure Valves provide a number of high-end domestically produced valves for China's nuclear chemical system. Among them: China Nuclear Su Valve was originally developed in the 60-70s, and it has independently developed torpedo vacuum valves and rotary vacuum valves. The products, which were used as the main products of domestic production, were mass-produced, enabling the localization of the torpedo vacuum valves for key valves of nuclear chemical systems. Shanghai Valve Factory has participated in many major national projects in the past 40 years. For example, it provided stainless steel valves to the national nuclear chemical enriched uranium project in 1962.
Recent localization of key valves has also achieved results: Baoyi Valve Group and Zhejiang University jointly developed high-end ultra-low temperature series valves, and Zhejiang Chaoda Valve provided Shenhua Group with a group of R&D wear-resistant high-temperature wearable metals for the localization of “coal hydrogen productionâ€. Hard seal localized ball valve; Lanzhou High-Pressure Valve Co., Ltd. independently developed the high-pressure flat-plate valve for localization of high-sulfur natural gas valve independently developed by Sinopec Puguang Gas Field; Jiangsu Yangzhong Valve Factory R&D has played an important role in the energy-saving and environmentally friendly sulfur recovery device series. And so on, and gradually promote the application in the country, so that these high-end valves to achieve localization. Beijing Aerospace Petrochemical Technology and Equipment Engineering Co., Ltd. develops and develops two new domestic products, "Safety valve quick-change devices that meet backup and discharge capacity" and "Non-flow type pilot-type pilot-type safety valves."
The valve industry plays an important role in the development of the national economy as an important part of the equipment manufacturing industry. As there is still a certain gap between China's domestic valve manufacturing industry and the international advanced level, many high-parameter, high-temperature, high-pressure, high-pound critical valves have always depended on imports. In order to promote the localization of valves, the State Council issued the "on speeding up the promotion. After several opinions of the equipment manufacturing industry, the relevant national departments have successively made a series of major deployments according to the requirements of the country for major equipment localization, and are led by the National Development and Reform Commission. Together with the China National Machinery Industry Association and China General Machinery Industry Association, Deployed and formulated the valve localization program for major equipment in related fields, and coordinated with related departments several times, and now the localization of valves has formed a consensus in the domestic valve industry.
After 20 years of research, design, manufacture, and users' joint efforts in recent years, joint research has been fruitful. West-to-East Gas Transmission Project, South-to-North Water Diversion Project, Three Gorges Water Control Project, Million-kilowatt nuclear power unit, million-ton ethylene renovation project, supercritical and ultra-supercritical thermal power unit, oil and gas pipeline transportation, coal chemical industry, large-scale ship, and municipal wastewater In areas such as processing and major engineering equipment and nuclear power, petrochemicals, metallurgy, and power plants, in addition to a small number of high-parameter safety valves and regulating valves that need to be imported, localization of valves has been realized, thereby changing the situation in which key valves of major equipment are permanently controlled by foreign countries. . And strive to achieve as much as possible in the short term major projects and key valves to achieve localization, or part of the realization of localization, so that China's valve manufacturing industry in the forefront of the world.
Starting from scratch, accelerating the pace of localization of valves The domesticization of Chinese valves has always been a long way to go. At the beginning, China advocated the localization of valves. It was not plain sailing and encountered resistance at all levels. It was more controversial. After the experts of the older generation valve industry and some scientific research departments of the nuclear industry have tackled problems and coordinated efforts, domestically-made ones and resolutely domestically-made ones will try their best to wipe out the ball and save foreign exchange for the country.
The localization of China’s valves was nothing at all, starting from scratch, and starting from localization in nuclear power plants and nuclear chemicals, as well as petrochemical equipment. In the 1980s, the first 600,000 nuclear power units related to key engineering projects were captured, and later When Qinshan Nuclear Power Station was engaged, Ningbo Valve Factory, as a pilot enterprise for the localization of valves for nuclear engineering fittings, contributed to the localization of valves. After the reform and opening up, China increased the localization of valves. With the continuous improvement of the manufacturing technology of the valve industry, many companies used the advanced resin sand molding line to produce casting blanks. The chemical composition of the castings was analyzed by a direct reading spectrometer. Cobalt 60 gamma rays are used to detect defects in castings; forging uses advanced technologies such as tire die forging and multi-directional die forging. After entering the 21st century, the pace of localization of valves has been accelerated, and there have been achievements in the localization of major projects.
After issuing the "Several Opinions on Accelerating the Revitalization of the Equipment Manufacturing Industry", the State Council led the equipment manufacturing industry to revitalize in an all-round way. For this reason, the National Development and Reform Commission, the China National Machinery Industry Federation, and the China Association of National Associations and other national departments have long proposed the plan to gradually realize the nationalization of major equipment and valves during the “10th Five-Year Plan†and “Eleventh Five-Year Plan†period, which proposed the realization of millions of kilowatts. The key valves of nuclear power plants and the localization of valves for large-scale ethylene equipments of one million tons were introduced into key technologies and self-developed, and many concessions were given to regulations and policies. As a result, relevant valve companies seized the opportunity to take the initiative to make the country Localization of valves. Consensus was formed up and down, and localization of valves made gratifying progress.
Significant progress has been made in the localization of nuclear power valves. Key valves of nuclear power plants are important equipment for nuclear power plants. For a long time, they have mainly depended on imports. Foreign countries have always imposed a technical blockade on China in order to earn high profits. This has also become a bottleneck restricting the localization of nuclear power in China. one. The development of domestic nuclear valves started in the early 60s. After several decades of efforts, China has formed a large-scale nuclear valve design, experiment, manufacturing, and testing capabilities, and provided a large number of nuclear-level valves for Qinshan Nuclear Power Station Phase I and Phase II construction. It has made important contributions.
The domestic backbone enterprises have taken active actions and actively overcome difficulties to worry about the country, provoking the heavy burden of localization of nuclear valves for R&D and manufacturing. A batch of old enterprises, such as the China Nuclear Suval Valve, Shenyang Shengshi, Dalian DaLiang, obtained the qualification for designing and producing nuclear valves, and achieved results in the process of localization of nuclear valves in China. At present, 19 companies in China have obtained the civil nuclear pressure bearing equipment design and production qualification license issued by the National Nuclear Safety Administration, and can design and produce nuclear valves. Its design, production of valve types include gate valves, globe valves, and control valves. Among these 19 companies, there are five companies that design and produce nuclear I-level valves (China Nuclear Su Valve, Shen Gao, Da Gao, Shang Valve, and Shanghai Lianggong). At present, China has successfully developed high-level cores such as pressurized water reactor nuclear island nuclear I-level electric gate valve, check valve, electric bellows shutoff valve, fast nuclear reactor reactor nuclear grade II electric corrugated sodium shut-off valve, etc. valve. In 2003, China Nuclear Susu applied for the “Research and Development of Key Valve Design and Manufacturing Technologies for Nuclear Power Stations†project of the National Defense Science and Technology Commission, and decided to fully develop five types of nuclear power plant key valves and break international monopoly. In 2006, the National Development and Reform Commission entrusted the China Machinery Industry Federation to review and demonstrate the implementation of the three nuclear power valve localization projects of China Nuclear Suval Valve, Shenyang Shengshi and Dalian Dagao’s “Localization Industrialization of Valves for Millions of Kilowatts of PWR Nuclear Power Unitsâ€. After that, it will form the core force of the nationalization of the national nuclear valve so that China’s nuclear power projects under construction are no longer subject to human control.
Last year, with the start of the construction of the second generation of improved nuclear power projects such as Hongyanhe and Ningde, and the introduction of the third generation of nuclear power technologies such as Sanmen and Haiyang after the introduction of nuclear power technologies, the localization of nuclear power equipment has made significant progress in the past two years. Based on the Qinshan Phase II expansion project, in recent years, the valve industry has successively successfully developed nuclear valves with advanced domestic level. The valve manufacturers that have passed the technical appraisal are: China Nuclear Susong Valve has completed a nuclear rapid opening and closing isolation valve. , Electrostatic pressure relief valve, low pressure differential swing check valve and nuclear secondary hard seal containment duct isolation valve and other 14 specifications, variety of prototype manufacturing, and passed a variety of type tests and provincial and ministerial level Identification; Jiangsu Shentong Valve's nuclear secondary containment isolation butterfly valve; Dalian Dagao's nuclear grade globe valve, gate valve and check valve; Shanghai valve plant's main steam isolation ball valve; Jiangsu Wujiang City Dongwu mechanical nuclear grade main steam Safety valve and nuclear 2nd, 3rd level auxiliary system safety valve, etc.; Zhejiang Global Valve Group's nuclear 2nd class globe valve; HZD, HQB type 1E nuclear level valve electric device of Jiangsu Changzhou Power Plant Auxiliary Machinery Plant; Yangzhou Power Equipment Repair Factory Nuclear-valve electric actuator with buffer device; Nuclear class K1 valve electric device of Tianshuangtong valve in Tianjin; Nuclear-grade air-isolation valve of Shijiazhuang No. 1 valve factory; Nuclear of Suzhou Newway valve Grade 1 electric shutoff valve, nuclear 2nd grade electric ball valve, nuclear 3rd grade electric butterfly valve; and Shenyang Shengshi high and medium pressure valve nuclear 1st grade electric gate valve and nuclear 1st swing check valve and Suzhou high and medium pressure valve factory nuclear grade valve products Such as a number of nuclear-level valves, has passed the new technology appraisal hosted by the National Machinery Industry Federation and other research departments. Recently, the CNS Su Valve has completed the development of various prototypes such as nuclear level, nuclear rapid opening and closing isolation valves, proportional spray valves, hard-sealed containment air isolation valves, electric pressure relief valves, and main steam isolation valves. Type tests and other relevant assessments and completion of cold-state functional tests to meet the nuclear power engineering needs. 