Safe and energy-saving control device and control method of hot rolling high-pressure descaling system
An energy-saving control and descaling system technology, applied in the direction of rolling mill control devices, metal rolling, metal rolling, etc., can solve problems such as intermittent operation state and short-term shutdown without consideration, achieve stable speed, reduce motor rotor damage, The effect of reducing power consumption
Inactive Publication Date: 2012-10-31
BAOSTEEL STAINLESS STEEL
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Problems solved by technology
In addition, for the daily random failures and routine maintenance of equipment during the operation of the hot rolling production line, there are also some short-term shutdowns with uncertain time
The existing frequency conversion operation control method does not consider how to control the intermittent operation state
Method used
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[0090] The process flow diagram of an embodiment of the hot-rolled high-pressure descaling system is as follows figure 1 Shown: During the production process of the hot-rolled high-pressure descaling system, the low-pressure water is pressurized into high-pressure water by the descaling pumps M1, M2, M3, and M4, and energy is stored in the gas-water energy storage tank E. When the heating furnace Fec1 , Fec2, and Fec3, the billets B1 and B2 arrive at the entrance and exit descaling points HSBa and HSBb of the rough rolling descaling box, the rough rolling mill entrance descaling point RMa, the exit descaling point RMb, the finishing rolling mill For scale points FSBa and FSBb, different descaling processes are carried out according to different steel billets. Different steel types have different descaling times at each descaling point. Some billets need descaling at a certain descaling point, and some do not. Descaling is required. When descaling is required, high-pressure wat...
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The invention discloses a safe and energy-saving control device and a control method of a hot rolling high-pressure descaling system, and relates to workpiece surface treatment equipment which is specially arranged and mounted in a rolling mill or is specially connected with a metal rolling mill for use. The safe and energy-saving control device comprises an operation control unit, a variable frequency pump operation state signal unit, a variable frequency giving unit and a variable frequency motor driving unit, wherein a pressure detection unit is connected with the operation control unit to feed back system pressure to the operation control unit; feedback control is performed on the rotation speed of the variable frequency pump through the variable frequency giving unit and the variable frequency motor driving unit to form a constant pressure control master control loop; a steel blank tracking signal is acquired through a steel blank tracking signal unit to perform feed-forward correction on the rotation speed of the variable frequency pump to form a variable flow energy-saving control auxiliary loop; operation control unit programmable control is formed by a CPU (Central Processing Unit) and a PLC (Programmable Logic Controller) to perform accurate control over the operation of a descaling water pump motor of the high-pressure descaling system; and the power consumption of the descaling system during operation is reduced on the premise of guaranteeing that water outlet of the system meets the technological requirement of descaling of the system.
Description
technical field [0001] The invention relates to workpiece surface treatment equipment specially configured or installed in a rolling mill or used in conjunction with a metal rolling mill, in particular to a safety and energy-saving control device and a control method for a hot-rolled high-pressure water descaling system. Background technique [0002] The hot-rolled descaling system is mainly composed of high-voltage motors, pump bodies, balance soda tanks, thermal protection valves, on-site injection valves and other equipment. The furnace raw oxide scale and the secondary oxide scale regenerated during the rolling process ensure the surface quality of the finished steel product. [0003] The high-pressure descaling pump is usually a multi-stage booster pump, driven by a high-voltage motor, generally a 2-high speed motor, the motor is started directly with a reactor or a series resistance, and the motor is operated continuously for a long time . The entire high-pressure de...
Claims
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IPC IPC(8): B21B37/00B21B45/08
CPCY02P70/10
Inventor 张斌詹世明
Owner BAOSTEEL STAINLESS STEEL
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