Development trend of control mode of the hottest v

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Development trend of valve control mode

with the development of large-scale complete sets of technology abroad, a series of new complete sets of equipment and single machines have emerged. The development of new complete sets of equipment related to valves is characterized by large-scale, high parameter, high-performance automation and complete sets, which are suitable for the control mode of these complete sets of equipment. In the past 20 years, the control methods of valves abroad have also developed greatly. In addition to the general manual, motorized, electric, pneumatic and hydraulic transmission to make the braking safe and reliable, the varieties of electro-hydraulic linkage, gas-liquid linkage and automatic control valves are increasing, and there is a trend of further development

such as oil refining equipment. The largest refinery is 36.4 million tons/year (Virgin Islands in the Caribbean), and 30million tons/year (Venezuela). At present, there are nearly 30 refineries with the size of more than 10 million tons/year that scientifically predict the cutting force, shaft delamination and uncut fiber yarn burrs; The processing capacity of the largest unit oil refining decompression unit reaches 240, and the length of the spring can be measured to 0 million tons/year, the catalytic cracking unit reaches 8.24 million tons/year, and the hydrocracking unit reaches 3.2 million tons/year. The large-scale device has forced the valve to become larger and larger, and the control mode has also begun to develop in the direction of automation

in recent years, long-distance pipelines have developed rapidly, mainly due to the low cost, which is only equivalent to 1/3 of railway transportation; Second, it is buried underground and not easy to be damaged; Third, the pipeline construction speed is fast and the investment is low. Therefore, the demand for valves for long-distance pipelines has increased significantly in recent years. The maximum unit capacity of power generation equipment is 1.3 million KW for double shaft thermal power units, 1.2 million KW for single shaft thermal power units, and 1.3 million KW for the largest nuclear power units

among the valves matched with these complete sets of equipment, the diameter of the largest flat gate valve reaches 1620mm and 2000mm; The maximum diameter of butterfly valve is 9750mm; The maximum diameter of the ball valve is 3050mm, and the weight of the valve, excluding the driving device, reaches 184 tons; The maximum diameter of gate valve for water is 2750mm, and the pressure reaches 9Mpa

the economic effect of large-scale equipment can be summarized as follows: first, improve production efficiency, second, reduce infrastructure investment, and third, reduce the consumption of raw and fuel materials. Compared with 1million tons of oil refining equipment with an annual processing capacity of 5million tons, the investment in production capacity per ton of products is reduced by 50%. Compared with two 3million ton/year refineries, the investment of a 6million ton/year refinery is only 69% of the latter, the steel consumption is 53%, the floor area is 54%, the production cost is 75% to reflect the concept of classified implementation, and the labor productivity is increased to 170%

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