Water supply device of after-rolling cooling system

Abstract

The invention discloses a water supply device of an after-rolling cooling system, which comprises a water pump and is characterized in that: one path of the water outlet of the water pump is connected with a cooling system through a pipe; the other path of the water outlet is connected with a high water tower through a pipe; and the high water tower is provided with an overflowing opening. The pipe connecting the water outlet of the water pump and the cooling system and the pipe connecting the water outlet of the water pump and the high water tower are both provided with a valve. When the water supply device works normally, both a valve (7) and a valve (8) in the pipes are opened; when the flow of the water supply pump is bigger than the actual water volume for superfast cooling, excessive water flows through the valve (7) to return to the high water tower and overflows out of the overflowing opening of the high water tower; and when the flow of the water supply pump is smaller than the actual water volume for superfast cooling, the water level in the high water tower falls to ensure the water supply capacity of the water pump is bigger than the maximum water volume for superfast cooling, and thus, the pressure of the whole water supply system can remain constant all the time.

Description

Technical field [0001] The invention belongs to the technical field of rolling automatic control, and in particular relates to a water supply device of a medium and heavy plate rolling cooling system. Background technique [0002] Water pressure regulation is an important issue in the ultra-fast cooling system for medium and heavy plates. The problems of pressure fluctuation and slow pressure adjustment time in the process of water pressure adjustment directly restrict the production efficiency and effect of the ultra-fast cooling system for medium and thick plates. In actual production, the steel plate to be cooled often oscillates in front of the cooling zone due to the failure of the water pressure adjustment requirements, resulting in a drop in the opening cooling temperature, which makes the performance and plate shape of the cooled steel plate not guaranteed, and the The swing also greatly reduces production efficiency and increases the production costs of steel companies....

AI Technical Summary

Problems solved by technology

① Power frequency pump: This control method adjusts the water pressure mainly through the pressure regulating valve at the terminal of the cooling equipment. The disadvantage is that the energy consumption is high and the vibration of the terminal equipment is relatively large.

②Variable frequency pump: This method is to adjust the frequency and voltage of the pump motor. Since multiple pumps participate in closed-loop control, the adjustment is difficult

③Industrial frequency conversion mixing: This control method also needs the assistance of a pressure regulating valve due to the small adjustment range, so there is also the problem of equipment vibration

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