Development Trend of High Pressure Descaling Valve Technology
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Release Time：2022-02-23
The transformation process of the high-pressure descaling valve system in the steel plate production line is the epitome of the development and evolution of the high-pressure descaling valve technology. After years of development, the high-pressure descaling valve system has made breakthrough progress in various technologies, and is developing in the direction of large flow, high pressure, low energy consumption, high impact force and high stability.
The transformation process of the high-pressure descaling valve system in the steel plate production line is the epitome of the development and evolution of the high-pressure descaling valve technology. After years of development, the high-pressure descaling valve system has made breakthrough progress in various technologies, and is developing in the direction of large flow, high pressure, low energy consumption, high impact force and high stability.
(1) The descaling pressure is developing in a higher direction. From 10MPa in the 1950 s to the current 18-22mpa, the working pressure can reach more than 25MPa as required. The higher the descaling pressure, the better the descaling effect.
(2) The unit water quantity for descaling continues to increase. The descaling pump is developing in the direction of high pressure and large flow. The output flow of a single pump increased from 120 m3/h to more than 600 m3/h. The piston pump used in the early stage of the high-pressure descaling valve was replaced by more stable plunger pump and centrifugal pump because of its low pressure, small flow rate and poor descaling effect.
(3) Descaling headers tend to be multi-point and dense. Descaling from the blanking billet to the rolling process; Descaling from the front of the mill to the front and back of the mill; Descaling from single header to multiple headers; It is fixed on the descaling device by the upper header, and the descaling device is dynamically adjusted with the thickness of the billet.
(4) The performance of the descaling nozzle is continuously improved. After years of innovation, the high-pressure descaling valve nozzle has developed into a professional series of products. Nozzle head material from ordinary carbon steel to stainless steel and then to wear-resistant hard alloy, the service life is continuously improved; the structure is fixed by ordinary thread to fixed positioning keyway, and equipped with filter and stabilizer to prevent blockage, so that the water flow is more concentrated, improve the impact force.
(5) nozzle and header layout more professional. The arrangement angle, number, spacing and online installation height of the nozzles on the descaling header directly affect the descaling effect of the system.
(6) The electrical control system and interlocking protection are more complete. In order to ensure the safe and stable operation of the system, the high-pressure descaling valve system and related equipment are equipped with various detection components, and the interlocking automatic control is realized through PLC. With the development of intelligent manufacturing technology, it is networked with the rolling production line system to realize remote monitoring, unattended and integrated operation.
(7) The descaling pump unit is developing in the direction of energy saving and stability. The hydraulic coupling is an energy-saving method with small investment, reliable operation and obvious system pressure stability. Widely used in domestic and foreign high pressure descaling valve system.
In addition, the frequency conversion speed regulation mode can also better realize the energy saving and stable operation of the system, and the overall effect is better than the hydraulic coupling mode, which becomes the future choice.
In short, both at home and abroad are exerting pressure on the high-pressure descaling valve system, increasing the amount of water sprayed per unit descaling width, improving the descaling effect, improving the safe operation and automatic control level of the system, and reducing energy consumption, which are important technical and economic indicators of the high-pressure descaling valve system. Stability, reliability and energy saving are the development direction of high pressure descaling valve technology.
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