linear bearings

Regulating valve - Be thrown 10 years abroad

by:AIRWOLF     2020-06-07
Adjusting valve ( Regulator is mainly used in industry electric control valve, pneumatic control valve, self-reliance type control valve, electric ball valves/butterfly valves, pneumatic ball valves/butterfly valves, pneumatic Angle seat valve, etc. ) Technology is thrown 10 years abroad regulating valve occupies a considerable proportion in mechanical products, according to foreign developed countries, the output value of the regulating valve is the sum of compressor, fan and pump, accounts for about 5% of the whole machinery industrial production. At the same time, as an important part of major technical equipment, especially in electric power, petrochemical, metallurgy, urban water supply and drainage system, the regulating valve is plays a key role, and the dosage is very large. At present, the regulating valve more than about 6000 enterprises, of which more than 5 million yuan output value of 900. When it comes to the current situation of the regulating valve industry in China, the Beijing municipal engineering design & research institute professor engineers guang-jie wang, chief Zhang Yanhui thinks, although a lot of enterprises engaged in regulating valve production in our country, but many small and medium-sized enterprises. , a few small businesses have neither drawing nor the process, no more technical personnel, products do not conform to the national standard, and even produce fake and inferior products, severely disrupted the market regulating valve, also waste the precious resources. Many large state-owned enterprises faced with heavy burden, financial difficulties, and the problems of old technology, and no power technical renovation and invest in new projects. Regulating valve technology with the international advanced level and 10 years or so, much like some high temperature and high pressure and strong corrosion resistant products can not production, the regulation of offshore oil mining use valve requires 10 ~ 15 years not leak, we are basically reach the requirement. Long distance pipeline lines also have with foreign products, domestic products can only be used on the feeder. Learned, our country existing two professional institute, institute of administrative office in a factory 12, engaged in regulating valve research and product development of scientific research personnel, about 6000 people in a ministerial inspection center and two sub-center, can adjust the safety valve, steam trap and general valve performance testing, but lack of high performance, high temperature parameters of dynamic simulation test method and test equipment. Regulating valve industry research institutions is less, fewer than 10% of the staff, scientific research and development ability is weak, on the basic stay in experience design method at present. Or, still can only refer to foreign some structure and prototype, work on some of the digestion and absorption, and rarely real product development work. Regulating valve industry technology from abroad and the status quo, related data show that for decades, with the development of large complete sets of equipment technology, foreign appear a series of new equipment and prototype, and form a complete set of regulating valve is characterized by large scale, high parameterized, automation and integration. And a series of new varieties is growing. Such as emergency cut-off valve, quick closing valve, fire and water valves, etc. Basic parameters adjusting valve has a lot to improve, such as gate * large diameter of 4200 mm, temperature 1050 ℃, pressure of 105 mpa. Ball valve 3050 mm, the temperature is 1200 ℃, pressure 70 mpa. And regulating valve products abroad, many varieties, good performance, reliable sealing, long service life. Such as ball valves can reach more than 100000 times without leakage. Cast iron gate valve switch 30000 times, reliable action, switch is quick. In recent years, the regulating valve by the rapid development of scientific research institutes of the abroad, the United States alone, nearly 30 institute, generally belong to the company. Such as Rockwell company has a very perfect scientific research and testing base, to hot products, dynamic, wear-resisting, earthquake, fire and reliability aspects of performance testing. Finite element method (fem) and computer aided design is widely used, the structure of the regulating valve design tend to be more reasonable. Regulating valve industry in China, by contrast, technology is relatively backward, and regulating valve products are mainly concentrated in the low-end market, for the excellent product research and development level is not high. Valves to regulate the gap mainly displays in: the current domestic industry technical level is only at the level of abroad in the early 90 s. Complete set of low level, such as the current can only meet 20 ~ 300000 kW thermal and 450000 t/a ethylene plant matching with the valve. And 600000 kW of thermal valve, 700000 t/a 1 million t/a ethylene plant even with valve, still needs a large number of imports. Industry insiders, worldwide, to adjust the valve drive more varieties, complete specifications, safe and reliable. In recent years, and the development of the intelligent device drivers, in this respect, the domestic is still blank. Valves to regulate the domestic industry is a big gap between the overall and abroad. Regulating valve - Be thrown 10 timeline now foreign technology, product design, constant for many years, new product development ability is weak, specification variety, less can't meet the technological requirements of all walks of life. Products following foreign technology development, technology development and kung fu is not enough, the manufacturing process is relatively backward. Future regulating valve technology and product development of enterprise should pay attention to several aspects of the China general machinery industry association valve branch held the sixth second member representative assembly
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