CN102755997A - Safe and energy-saving control device and control method of hot rolling high-pressure descaling system - Google Patents
Safe and energy-saving control device and control method of hot rolling high-pressure descaling system Download PDFInfo
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Abstract
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
The present invention relates to special configuration in or be installed in the milling train or aim at the surface of the work treatment facility with the rolling mill for metal logotype, relate in particular to a kind of energy-saving safe control device and control method thereof that is used for the hot rolling high-pressure water descaling system.
Background technology
The hot rolling descaling system mainly is made up of equipment such as high-tension motor, the pump housing, balance air hydraulic cylinder, hot protective valve and on-spot injection valves; Its effect is the powerful impulsive force through water under high pressure; The stove that the removing hot rolling steel billet produces in heating furnace heating process is given birth to the secondary oxidation iron sheet of regenerating in the iron scale and the operation of rolling, guarantees steel finished surface quality.
The high pressure descaling pump is generally multistage booster water pump, adopts high-voltage motor to drive, and is generally 2 high rotating speed motors, and the Starting mode of motor is that reactance device or series resistor directly start, and the method for operation of motor is the long-time continuous operation.Whole high pressure descaling system is supplied water by the separate unit water pump usually or many water pump parallel connections are supplied water, the maximum water consumption when satisfying de-scaling.
Because under rolling different product and different rolling rhythm, the flow of the quantity of its de-scaling point, position, de-scaling is in variation at any time.According to the hot rolling manufacturing technique requirent, the high pressure descaling system is when non-de-scaling, and each injection valve is in closed condition, and the de-scaling motor moves for being bordering on unloaded mode, and current are through hot protective valve backflow trench; When system during in de-scaling, each de-scaling injection valve is opened, and system pressure sharply rises to rated pressure, and this moment, whole current treated that through pressure piping, descaling pump, nozzle directive the de-scaling slab is to accomplish de-scaling.When each power frequency startup of descaling system pump motor and water jet descaling process operation, load sharply changes the generation dash current, and rotor is produced very big impulsive force, makes motor internal impaired, has reduced the service life of motor, has influenced the normal operation of rolling line.
Chinese invention patent " high-pressure water descaling system " (patent of invention number: ZL200510032519.9 publication number: CN1775399) disclose a kind of high-pressure water descaling system; Comprise filter rinsed and minimum flow valve group; Behind said self-cleaning filter, be provided with diaphragm type water tank, descaling pump group successively, be provided with on low pressure Prefill valve group, the machine descaling header on de-scaling injection valve group, the machine, efficient descaling jet, De-scaling box de-scaling injection valve group, De-scaling box descaling header and De-scaling box high efficiency nozzle after the said minimum flow valve group successively.The high-voltage frequency conversion and speed-adjusting technology is adopted in this invention; System pressure and flow can be regulated according to material, the temperature of incoming slab automatically; Simultaneity factor can be accomplished the buck process in the short period of time, has improved rolling rhythm and has cut down the consumption of energy to greatest extent and improved de-scaling efficient.But this system adopts variable-frequency control technique according to steel grade situation adjustment de-scaling pressure, still has following problem:
At first, hot rolling is under the situation of rolling different steel grades, because the difference of de-scaling point; Required flow is widely different, even for a kind of steel billet, the several different aqueous conditions of using were arranged also in each cycle of de-scaling process; Each is short with the time that aqueous condition continues, and has only several seconds or tens seconds, and what have possibly reach a few minutes; And existing system in design often according to the greatest requirements flow design, water under high pressures a large amount of during the low discharge state go out of use, and cause serious waste of energy.Simultaneously, existing converting operation control method can not adapt to the state of this flow frequent fluctuation, usually causes the pressure oscillation of water under high pressure, and then influences scale removal effect.
Secondly, hot rolling line has the repeatedly roll change about 10 minutes every day, do not need de-scaling (promptly not needing discharge) during the roll change, and descaling pump is normally non-stop-machine during roll change.In addition, for the random fault of the daily generation in the hot rolling line running and the regular maintenance of equipment, also exist uncertain short time interval of some times to shut down.Existing converting operation control method does not have to consider the how control of this intermittent duty state yet.
Summary of the invention
The purpose of this invention is to provide and a kind ofly be controlled to be the master with constant pressure; The steel billet tracking signal is the energy-saving safe control device of the hot rolling high pressure descaling system assisted; Solution keep-ups pressure stable under descaling system intermittent duty, water under high pressure flow fluctuation status, and realizes the technical problem of Energy Saving Control.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
The energy-saving safe control device of a kind of hot rolling high pressure descaling system; Described high pressure descaling system comprises the variable frequency pump that variable-frequency motor drives; Be connected to the energy storage canister of water under high pressure pipeline; And be distributed in several de-scaling points on the hot rolling line, wherein each de-scaling point is made up of the descaling jet of several injection valve group controls; Described energy-saving safe control device comprises that Operations Analysis, variable frequency pump operating state signal unit, frequency conversion frequency are to cell and variable-frequency motor driver element; Described hot rolling line control system comprises steel billet tracking signal unit and fieldbus unit; It is characterized in that:
Described variable frequency pump operating state signal unit comprises pressure sensing cell and Level Detection unit at least;
Described Operations Analysis is connected to described frequency conversion frequency and gives cell, to cell output variable-frequency motor frequency signal, is sent to the variable-frequency motor driver element through the frequency conversion frequency; Described pressure sensing cell is connected to described Operations Analysis; System pressure is fed back to Operations Analysis; Give cell and variable-frequency motor driver element through the frequency conversion frequency, the rotating speed of variable frequency pump is carried out FEEDBACK CONTROL, constitute constant pressure and control main control loop;
Described energy-saving safe control device is connected to described steel billet tracking signal unit through the fieldbus unit, obtains the steel billet tracking signal; Described Operations Analysis obtains the liquid level signal and the real-time moisture storage capacity that calculates water under high pressure of energy storage canister through described Level Detection unit; Described Operations Analysis is confirmed the unlatching quantity of injection valve according to the steel billet tracking signal, thereby Real-time and Dynamic is calculated the water requirement of high pressure dephosphorization; Described Operations Analysis is according to described moisture storage capacity and water requirement, gives cell and variable-frequency motor driver element through the frequency conversion frequency, to the correction that feedovers of the rotating speed of variable frequency pump, formation unsteady flow amount Energy Saving Control subsidiary loop.
A kind of preferable technical scheme of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system is characterized in that described Operations Analysis comprises central processing unit (CPU) and Programmable Logic Controller (PLC); CPU is connected to described steel billet tracking signal unit through the fieldbus unit, confirms the maximum water requirement of high pressure dephosphorization and the upper and lower bound of system pressure according to steel billet kind and rolling mill practice, calculates de-scaling water pressure setting value; Be sent to the setting value input of PLC; The system pressure of variable frequency pump feeds back to the feedback input end of PLC, carries out PID by PLC and regulates computing, and the water outlet frequency setting value of output variable frequency pump is sent to the variable-frequency motor driver element through the frequency conversion frequency to cell.
A kind of better technical scheme of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system is characterized in that described steel billet tracking signal unit comprises steel billet position signalling unit, steel billet number signal unit, de-scaling number of spots signal element and de-scaling dotted state signal element; Said each signal element is connected on the fieldbus unit; Described Operations Analysis is through said each signal element of fieldbus unit poll; Obtain the injection valve group switch state signal of steel billet position, quantity and de-scaling number of spots and de-scaling point on the hot rolling line in real time; And calculate every block of steel billet in view of the above and arrive the time of each de-scaling point and the unlatching sequential of injection valve group; Calculate the needed flow of each de-scaling point and de-scaling point combination, through the frequency conversion frequency to cell to the correction that feedovers of the rotating speed of variable frequency pump.
A kind of improved technical scheme of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system; It is characterized in that described energy-saving safe control device is provided with the monitoring alarm unit, described variable frequency pump operating state signal unit also comprises temperature detecting unit; Described monitoring alarm unit comprises controlling alarm unit and status display unit; Described controlling alarm unit obtains system running state through steel billet tracking signal unit and variable frequency pump operating state signal unit, and the system running state that obtains is presented at status display unit; Under the system exception state, described controlling alarm unit is through the status display unit display alarm information.
A kind of further improved technical scheme of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system is characterized in that described energy-saving safe control device is provided with manual control input block; Under the system exception state, described energy-saving safe control device can receive the de-scaling preselected signal through described manual control input block, manually controls the high pressure descaling system through control module according to the technological parameter of preliminary election.
Another object of the present invention provides a kind of control method that is used for the energy-saving safe control device of above-mentioned hot rolling high pressure descaling system; Solve to use microprocessor control to be implemented in to keep-up pressure under descaling system intermittent duty, the water under high pressure flow fluctuation status stable, and produce the technical problem of energy-saving effect.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
A kind of control method of hot rolling high pressure descaling energy-saving safe control device is used for the energy-saving safe control device of above-described hot rolling high pressure descaling system, it is characterized in that may further comprise the steps:
S100) confirm the setting discharge pressure of system according to the high pressure descaling technological requirement, according to minimum process pressure and the requirement of minimum energy storage canister liquid level, initialization system upper limit of pressure and lower limit;
S200) detect the step of variable frequency pump running status in real time, wherein, comprise at least:
S220) through described pressure sensing cell real-time detecting system pressure,
S240) detect the liquid level of energy storage canister in real time through described Level Detection unit;
S300) the Programmable Logic Controller reading system detected pressure value of Operations Analysis compares with the setting discharge pressure in real time, according to the water outlet frequency setting value of pressure divergence through PID computing adjustment variable frequency pump, realizes constant pressure control;
S400) through described steel billet tracking signal unit, obtain the steel billet tracking signal in real time, wherein, the steel billet tracking signal comprises at least: the injection valve group switch state signal of the steel billet position on the hot rolling line, quantity and de-scaling number of spots and de-scaling point;
S500) according to the steel billet tracking signal obtained to the correction that feedovers of the frequency of variable frequency pump; Make variable frequency pump at idle condition frequency reducing energy-saving run; Described idle condition comprises the state that does not have steel billet on the hot rolling line, and steel billet is between the de-scaling point, injection valve group closing state.
A kind of preferable technical scheme of the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention is characterized in that the step S300 of described realization constant pressure control comprises following action:
S320) if system pressure less than the lower limit of setting pressure, then raises the water outlet frequency setting value of variable frequency pump, reach the upper limit of setting pressure up to system pressure, perhaps frequency reaches rated frequency;
S340) if system pressure greater than the upper limit of setting pressure, is then reduced the water outlet frequency setting value of variable frequency pump, reach the lower limit of setting pressure up to system pressure, perhaps frequency reaches the water outlet lower-frequency limit;
S360) if system pressure in the upper and lower bound interval of setting pressure, then keeps the water outlet frequency setting value of variable frequency pump constant.
A kind of better technical scheme of the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention is characterized in that described variable frequency pump frequency feedforward correction step S500 comprises following action:
S510) confirm that according to the steel billet tracking signal obtained steel billet begins de-scaling required de-scaling start-up time from coming out of the stove to;
S520), confirm the unit frequency of treating of system's idle condition down coversion pump, to guarantee in de-scaling start-up time, making variable frequency pump from treating that the unit frequency raising speed is to the water outlet frequency according to the variable-frequency motor response speed;
S530) get into roll change or breakdown maintenance state if steel billet tracking signal unit detects milling train, then under the situation that satisfies the requirement of minimum process pressure and minimum energy storage canister liquid level, make the variable frequency pump deceleration move according to the unit frequency of treating of idle condition;
S540) if milling train resumes operation, steel billet tracking signal unit detects the steel billet signal of coming out of the stove, and then makes variable frequency pump from treating that the unit frequency raising speed is to the water outlet frequency;
S550) if steel billet is between each de-scaling point, the injection valve group is in closed condition and does not carry out the de-scaling operation, then under the situation that satisfies the requirement of minimum process pressure and minimum energy storage canister liquid level, makes variable frequency pump move according to the water outlet lower-frequency limit;
S560) according to detected steel billet position, steel billet tracking signal unit; According to starting the variable-frequency motor raising speed pressure rising time in advance; To guarantee that steel billet is before arriving next de-scaling point; Variable frequency pump from water outlet lower-frequency limit raising speed to the water outlet frequency, wherein, described pressure rising time be variable frequency pump from water outlet lower-frequency limit raising speed to the required time of water outlet frequency;
S570) if 2 and the de-scaling simultaneously of above de-scaling point are arranged on the hot rolling line, then make variable frequency pump move, to keep de-scaling water requirement and energy storage canister moisture storage capacity balance according to rated frequency.
A kind of improved technical scheme of the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention is characterized in that further comprising the steps of:
S600) receive the de-scaling preselected signal through manual control input block, start the high pressure descaling operation manually according to the descaling process parameter of preliminary election;
S620) if manually the control input block lead that receives the de-scaling preselected signal is not less than pressure rising time, then when receiving the de-scaling preselected signal, start the variable-frequency motor raising speed, make variable frequency pump from water outlet lower-frequency limit raising speed to the water outlet frequency;
S640) if manually the lead of control input block reception de-scaling preselected signal then improves the water outlet lower-frequency limit less than pressure rising time, make the energy-saving safe control device carry out constant pressure control to the water outlet frequency of variable frequency pump according to pressure feedback signal.
The invention has the beneficial effects as follows:
1. the energy-saving safe control device and the control method thereof of hot rolling high pressure descaling of the present invention system; Through the system pressure feedback rotating speed of variable frequency pump is realized constant pressure control; Stablize the rotating speed of variable frequency pump; Reduce system shock, reduce the descaling system motor owing to cause rotor to damage in startup and operating load acute variation;
2. through detecting the steel billet tracking signal to the correction that feedovers of the rotating speed (frequency) of variable frequency pump; Be implemented under descaling system intermittent duty, the water under high pressure flow fluctuation status; Accurate control to the de-scaling pump motor operation of high pressure descaling system; Can satisfy under the prerequisite of system's descaling process requirement at the system of assurance water yield, reduce the power consumption that descaling system is in operation;
3. the control method employing of hot rolling high pressure descaling security of system energy-saving control device of the present invention is formed Operations Analysis by central processing unit (CPU) and Programmable Logic Controller (PLC) and is carried out programming Control; Both can possess the flexibility of computer software control; The real-time of Programmable Logic Controller hardware programming control can be brought into play again, and control program can be further simplified.
Description of drawings
Fig. 1 is the process chart of an embodiment of descaling system;
Fig. 2 is the systematic schematic diagram of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system;
Fig. 3 is the pressure model figure of descaling system constant pressure control;
Fig. 4 is the frequency model figure that rotating speed (frequency) feedforward of variable frequency pump is revised;
Fig. 5 is the general flow chart of the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention;
Fig. 6 is the constant pressure control sub-process figure of the control method of hot rolling high pressure descaling security of system energy-saving control device;
Fig. 7 is the frequency feedforward correction sub-process figure of the control method of hot rolling high pressure descaling security of system energy-saving control device.
The specific embodiment
In order to understand technique scheme of the present invention better, describe in detail further below in conjunction with accompanying drawing and embodiment.
Fig. 2 is the systematic schematic diagram of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system; The high pressure descaling system comprises the variable frequency pump 110 that variable-frequency motor drives; Be connected to the energy storage canister 120 of water under high pressure pipeline; And be distributed in several de-scaling points 130 on the hot rolling line, wherein each de-scaling point is formed (referring to Fig. 1) by the descaling jet of several injection valve group controls.Energy-saving safe control device of the present invention comprises that Operations Analysis 200, variable frequency pump operating state signal unit 400, frequency conversion frequency are to cell 500 and variable-frequency motor driver element 600; Hot rolling line control system comprises steel billet tracking signal unit 300 and fieldbus unit 310; Variable frequency pump operating state signal unit 400 comprises Level Detection unit 410 and pressure sensing cell 420 at least; Operations Analysis 200 is connected to the frequency conversion frequency and gives cell 500, gives cell 500 output variable-frequency motor frequency signals through the frequency conversion frequency, is sent to variable-frequency motor driver element 600; Pressure sensing cell 420 is connected to Operations Analysis 200; System pressure is fed back to Operations Analysis 200; Give cell 500 and variable-frequency motor driver element 600 through the frequency conversion frequency, the rotating speed (frequency) of variable frequency pump 110 is carried out FEEDBACK CONTROL, constitute constant pressure control main control loop;
The energy-saving safe control device of hot rolling high pressure descaling of the present invention system is connected to the steel billet tracking signal unit 300 of hot rolling line control system through fieldbus unit 310, obtains the steel billet tracking signal; Operations Analysis 200 obtains the liquid level signal and the real-time moisture storage capacity that calculates water under high pressure of energy storage canister through Level Detection unit 410; Operations Analysis 200 is confirmed the unlatching quantity of injection valve according to the steel billet tracking signal, thereby Real-time and Dynamic is calculated the water requirement of high pressure dephosphorization; Operations Analysis 200 is given cell 500 and variable-frequency motor driver element 600 according to moisture storage capacity and the water requirement of calculating gained through the frequency conversion frequency, to corrections that feedover of the rotating speed (frequency) of variable frequency pump 110, formation unsteady flow amount Energy Saving Control subsidiary loop.
According to the energy-saving safe control device of hot rolling high pressure descaling system shown in Figure 2, Operations Analysis 200 comprises central processing unit (CPU) 210 and Programmable Logic Controller (PLC) 220; CPU 210 is connected to steel billet tracking signal unit 300 through fieldbus unit 310, confirms the maximum water requirement of high pressure dephosphorization and the upper and lower bound of system pressure according to steel billet kind and rolling mill practice, calculates de-scaling water pressure setting value; Be sent to the setting value input of PLC 220; The system pressure of variable frequency pump 110 feeds back to the feedback input end of PLC 220, carries out PID by PLC 220 and regulates computing, and the water outlet frequency setting value of output variable frequency pump 110 is sent to variable-frequency motor driver element 600 for cell 500 through the frequency conversion frequency.
According to the energy-saving safe control device of hot rolling high pressure descaling system shown in Figure 2, steel billet tracking signal unit 300 comprises steel billet position signalling unit, steel billet number signal unit, de-scaling number of spots signal element and de-scaling dotted state signal element; Each signal element is connected on the fieldbus unit 310; Operations Analysis 200 is through fieldbus unit each signal element of 310 polls; Obtain the injection valve group switch state signal of steel billet position, quantity and de-scaling number of spots and de-scaling point on each de-scaling point 130 of hot rolling line in real time; And calculate every block of steel billet in view of the above and arrive the time of each de-scaling point and the unlatching sequential of injection valve group; Calculate the water requirement of each de-scaling point and de-scaling point combination, through the frequency conversion frequency to cell to the correction that feedovers of the rotating speed of variable frequency pump.
An improved embodiment according to the energy-saving safe control device of hot rolling high pressure descaling of the present invention system; The energy-saving safe control device is provided with monitoring alarm unit (not shown); Variable frequency pump operating state signal unit 400 also comprises the temperature detecting unit that is used to detect descaling pump group temperature, and the detecting unit (not shown) that is used to detect running statuses such as variable frequency pump flow, frequency, rotating speed; The monitoring alarm unit comprises controlling alarm unit and status display unit; The controlling alarm unit obtains each item running status of descaling system through steel billet tracking signal unit 300 and variable frequency pump operating state signal unit 400, and the descaling system running status of obtaining is presented at status display unit; Under the system exception state, described controlling alarm unit is through the status display unit display alarm information.
According to a further improved embodiment of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system, described energy-saving safe control device is provided with manual control input block (not shown); Under the system exception state, the energy-saving safe control device can receive the de-scaling preselected signal through manually controlling input block, manually controls the high pressure descaling system through control module according to the technological parameter of preliminary election.
Fig. 5 is the flow chart of control method of the energy-saving safe control device of hot rolling high pressure descaling of the present invention system, and this method is used for the energy-saving safe control device of above-described hot rolling high pressure descaling system.Energy-saving safe control device synthetical collection system pressure signal, descaling of steel stock technology signal, de-scaling passage signal, steel billet position signalling, descaling of steel stock status signal, energy storage canister pressure and liquid level signal, the descaling pump group temperature signal etc. of hot rolling high pressure descaling of the present invention system; Water pump is carried out frequency adjustment; Carry out high service according to required flow, reach energy-conservation purpose.System at first will satisfy minimum process pressure and the requirement of minimum energy storage canister liquid level when carrying out Flow-rate adjustment, utilize steel billet position signalling, descaling of steel stock technology signal, de-scaling passage signal, descaling of steel stock status signal etc. comprehensively to analyze in advance, calculate; Water pump is quickened in advance; Make system when hot rolling line de-scaling point needs flow, can satisfy process requirements, and when hot rolling line de-scaling point does not need flow; Slow down, to reach the purpose of energy-saving safe operation as far as possible.The control method of the energy-saving safe control device of hot rolling high pressure descaling system shown in Figure 5 may further comprise the steps:
S100) confirm the setting discharge pressure of system according to the high pressure descaling technological requirement, according to minimum process pressure and the requirement of minimum energy storage canister liquid level, initialization system upper limit of pressure and lower limit;
S200) detect the step of variable frequency pump running status in real time, wherein, comprise at least:
S220) through described pressure sensing cell real-time detecting system pressure,
S240) detect the liquid level of energy storage canister in real time through described Level Detection unit;
S300) the Programmable Logic Controller reading system detected pressure value of Operations Analysis compares with the setting discharge pressure in real time, according to the water outlet frequency setting value of pressure divergence through PID computing adjustment variable frequency pump, realizes constant pressure control;
The system model of constant pressure control of the present invention is shown in Figure 3, and ordinate is a pressure among the figure, and abscissa is the time, and solid line is a setting pressure, and dotted line is respectively the setting pressure upper limit and setting pressure lower limit.Control method of the present invention adopts and is adjusted to the master with pressure, and the steel billet tracking signal is the adjusting control model of assisting.Control system real-time tracking and acquisition system pressure, when system pressure when the setting pressure upper limit and setting pressure lower limit are interval, this moment, the frequency (rotating speed) of water pump operation was not regulated; When system pressure less than setting pressure under in limited time; This moment, the frequency (rotating speed) of water pump automatically raised, up to rated frequency (being generally power frequency supply frequency 50Hz), when system pressure greater than setting pressure in limited time; The frequency of water pump (rotating speed) is downward modulation automatically, up to the setpoint frequency lower limit.
S400) through described steel billet tracking signal unit, obtain the steel billet tracking signal in real time, wherein, the steel billet tracking signal comprises at least: the injection valve group switch state signal of the steel billet position on the hot rolling line, quantity and de-scaling number of spots and de-scaling point;
S500) according to the steel billet tracking signal obtained to the correction that feedovers of the frequency of variable frequency pump; Make variable frequency pump at idle condition frequency reducing energy-saving run; Described idle condition comprises the state that does not have steel billet on the hot rolling line, and steel billet is between the de-scaling point, injection valve group closing state.
Relate to rated frequency (50Hz), water outlet frequency, lower frequency limit in the control procedure of the present invention, treat unit frequency etc., the relation of each frequency is a rated frequency>the water outlet frequency>lower frequency limit>treat unit frequency, referring to Fig. 4.
According to the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention, realize that the sub-process figure of the step S300 that constant pressure is controlled is as shown in Figure 6, comprise following action:
S320) if system pressure less than the lower limit of setting pressure, then raises the water outlet frequency setting value of variable frequency pump, reach the upper limit of setting pressure up to system pressure, perhaps frequency reaches rated frequency;
S340) if system pressure greater than the upper limit of setting pressure, is then reduced the water outlet frequency setting value of variable frequency pump, reach the lower limit of setting pressure up to system pressure, perhaps frequency reaches the water outlet lower-frequency limit;
S360) if system pressure in the upper and lower bound interval of setting pressure, then keeps the water outlet frequency setting value of variable frequency pump constant.
Through above-mentioned constant pressure control step, variable frequency pump according to the pressure divergence of system pressure and setting pressure, through the water outlet frequency setting value of PID computing adjustment variable frequency pump, keeps the running of variable frequency pump constant pressure automatically.
According to the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention, the sub-process figure of the step S500 of realization variable frequency pump frequency feedforward correction is as shown in Figure 7, comprises following action:
S510) confirm that according to the steel billet tracking signal obtained steel billet begins de-scaling required de-scaling start-up time from coming out of the stove to;
S520), confirm the unit frequency of treating of system's idle condition down coversion pump, to guarantee in de-scaling start-up time, making variable frequency pump from treating that the unit frequency raising speed is to the water outlet frequency according to the variable-frequency motor response speed;
S530) get into roll change or breakdown maintenance state if steel billet tracking signal unit detects milling train, then under the situation that satisfies the requirement of minimum process pressure and minimum energy storage canister liquid level, make the variable frequency pump deceleration move according to the unit frequency of treating of idle condition;
S540) if milling train resumes operation, steel billet tracking signal unit detects the steel billet signal of coming out of the stove, and then makes variable frequency pump from treating that the unit frequency raising speed is to the water outlet frequency;
S550) if steel billet is between each de-scaling point, the injection valve group is in closed condition and does not carry out the de-scaling operation, then under the situation that satisfies the requirement of minimum process pressure and minimum energy storage canister liquid level, makes variable frequency pump move according to the water outlet lower-frequency limit;
S560) according to detected steel billet position, steel billet tracking signal unit; According to starting the variable-frequency motor raising speed pressure rising time in advance; To guarantee that steel billet is before arriving next de-scaling point; Variable frequency pump from water outlet lower-frequency limit raising speed to the water outlet frequency, wherein, described pressure rising time be variable frequency pump from water outlet lower-frequency limit raising speed to the required time of water outlet frequency;
S570) if 2 and the de-scaling simultaneously of above de-scaling point are arranged on the hot rolling line, then make variable frequency pump move, to keep de-scaling water requirement and energy storage canister moisture storage capacity balance according to rated frequency.
A kind of improved embodiment of the control method of hot rolling high pressure descaling security of system energy-saving control device of the present invention also comprises the following step that manual control is provided:
S600) receive the de-scaling preselected signal through manual control input block, start the high pressure descaling operation manually according to the descaling process parameter of preliminary election;
S620) if manually the control input block lead that receives the de-scaling preselected signal is not less than pressure rising time, then when receiving the de-scaling preselected signal, start the variable-frequency motor raising speed, make variable frequency pump from water outlet lower-frequency limit raising speed to the water outlet frequency;
S640) if manually the lead of control input block reception de-scaling preselected signal then improves the water outlet lower-frequency limit less than pressure rising time, make the energy-saving safe control device carry out constant pressure control to the water outlet frequency of variable frequency pump according to pressure feedback signal.
Embodiment
The process chart of an embodiment of hot rolling high pressure descaling system is as shown in Figure 1: hot rolling high pressure descaling system in process of production, low-pressure water adds through descaling pump M1, M2, M3, M4 and is pressed into water under high pressure, in air water energy storage canister E, carries out energy storage; When the steel billet B1 that from heating furnace Fec1, Fec2, Fec3, comes out, B2 arrive roughing De-scaling box inlet, outlet de-scaling point HSBa and HSBb; Roughing mill inlet de-scaling point RMa, outlet de-scaling point RMb, finish rolling De-scaling box enter the mouth, when exporting de-scaling point FSBa and FSBb; Carry out the descaling process of difference handles by different steel billets; Different steel grades are different at the de-scaling number of times of each de-scaling point, and the steel billet that has needs de-scaling at certain de-scaling point, and what have does not need de-scaling; When the needs de-scaling, undertaken to water under high pressure by descaling pump and air water energy storage canister.
System detects the steel billet signal of coming out of the stove; And the used time (de-scaling start-up time) when calculating steel billet and arriving roughing De-scaling box HSB, and the frequency converter response speed, draw frequency; This treats that unit frequency can guarantee that variable frequency pump can change by response pressure in de-scaling start-up time, in time amount of makeup water; Last piece descaling of steel stock finishes on hot rolling line, and the steel billet of front is not when also coming out of the stove, and the descaling pump operation that reduces speed now is treated unit frequency up to running to, and kept according to treating the unit frequency operation.Need the situation of standby to comprise: rolling line roll change, fault do not have the clear and definite time and are in abnormal production cycle.The roughing De-scaling box time is too short behind the steel billet stove if steel billet is come out of the stove, then according to the above-mentioned steps setting treat that unit frequency is just very high, energy-saving effect will variation; At this moment; Can begin the number of winning the confidence in the stove the inside from steel billet, the time signal before promptly steel billet is come out of the stove reaches optimum energy-saving effect; To put needed discharge smaller when steel billet de-scaling behind stove; The flow and the water in the energy storage canister of other descaling pump in many descaling pumps just can satisfy water requirement; Then can not consider de-scaling point flow behind the stove, only consider it and treat unit frequency through come out of the stove time of roughing de-scaling of measuring and calculating steel billet.
System is in adjustment process, and set-point signal and variable frequency pump operating state signal can carry out communication through I/O hardwire mode and PLC, sends into PLC to the total pipe pressure of closed loop feedback signal (distal-most end pressure), carries out the PID computing in the PLC.Feedback signal through to hydraulic pressure setting value and pressure sensor compares, and carries out computing by the PID adjuster, and result of calculation is delivered to frequency converter as set-point.
In this embodiment, whole de-scaling control system comprises temperature detecting unit, system pressure detecting unit, steel billet position detection unit, de-scaling dotted state detecting unit, steel billet quantity detecting unit, de-scaling point flow detection unit, alarm signal control module, cpu central processing unit, setting signal output module.Control device detects descaling system in real time, calculates the sequential that steel billet is produced, and promptly when begins de-scaling; When not de-scaling, signal such as several de-scalings is simultaneously arranged when de-scaling; Be input to this sequential and compare among the CPU and calculate, it is to produce any steel billet that different steel billet (like carbon steel and stainless steel) has different sequential, CPU to detect automatically; And compare and computing by sequential separately, the sequential of every kind of steel billet production all will be imported among the CPU.In the normal production cycle, promptly steel billet connects one coming according to one of ordinary production, and the parameter that will detect this moment does, steel billet in the position of hot rolling line, steel billet is at the de-scaling of hot rolling line is counted and de-scaling is counted flow; Calculate the time of steel billet through the position, can calculate the position that it begins to quicken to its next de-scaling point; Different flow through each point, can calculate de-scaling point and the needed flow of de-scaling point combination, this flow by classification successively from big to small, when when maximum stream flow makes up; Descaling pump is by rated frequency (50Hz power frequency) operation; When not being when maximum stream flow makes up, then utilize the PLC controller to regulate the descaling pump frequency, carry out the PID adjusting automatically by being not less than initialization system pressure; Carry out in the self-regulating process of PID at the PLC controller; To can not be lower than operations such as lower-frequency limit by flow combination, the how many kinds of flow combination is arranged, how many lower-frequency limits then can be set; When the flow of calculating the combination of counting during less than other power frequency operation descaling pump flow; Let descaling pump run slowly automatically; Will detect the steel billet position this moment, and the flow of the next combined spot of budget, the target velocity (frequency) that FEEDFORWARD CONTROL is slowed down; Variable frequency pump can be quickened when needed, the water requirement when reaching next combined spot rapidly to satisfy steel billet.
Like this, The whole control system detects in conjunction with the steel billet tracking signal according to the pressure of de-scaling pipe network distal-most end, realizes the accurate control of system, thereby realizes the energy-saving safe operation of hot rolling high pressure descaling system.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining technical scheme of the present invention; And be not to be used as qualification of the present invention; Any based on connotation of the present invention to variation, modification that the above embodiment did, all will drop in the protection domain of claim of the present invention.
Claims (9)
1. the energy-saving safe control device of a hot rolling high pressure descaling system; Described high pressure descaling system comprises the variable frequency pump that variable-frequency motor drives; Be connected to the energy storage canister of water under high pressure pipeline; And several de-scaling points that are distributed in zones of different on the hot rolling line, wherein each de-scaling point is made up of the descaling jet of several injection valve group controls; Described energy-saving safe control device comprises that Operations Analysis, variable frequency pump operating state signal unit, frequency conversion frequency are to cell and variable-frequency motor driver element; Described hot rolling line control system comprises steel billet tracking signal unit and fieldbus unit; It is characterized in that:
Described variable frequency pump operating state signal unit comprises pressure sensing cell and Level Detection unit at least;
Described Operations Analysis is connected to described frequency conversion frequency and gives cell, to cell output variable-frequency motor frequency signal, is sent to the variable-frequency motor driver element through the frequency conversion frequency; Described pressure sensing cell is connected to described Operations Analysis; System pressure is fed back to Operations Analysis; Give cell and variable-frequency motor driver element through the frequency conversion frequency, the rotating speed of variable frequency pump is carried out FEEDBACK CONTROL, constitute constant pressure and control main control loop;
Described energy-saving safe control device is connected to described steel billet tracking signal unit through the fieldbus unit, obtains the steel billet tracking signal; Described Operations Analysis obtains the liquid level signal and the real-time moisture storage capacity that calculates water under high pressure of energy storage canister through described Level Detection unit; Described Operations Analysis is confirmed the unlatching quantity of injection valve group according to the steel billet tracking signal, thereby Real-time and Dynamic is calculated the water requirement of high pressure dephosphorization; Described Operations Analysis is according to described moisture storage capacity and water requirement, gives cell and variable-frequency motor driver element through the frequency conversion frequency, to the correction that feedovers of the rotating speed of variable frequency pump, formation unsteady flow amount Energy Saving Control subsidiary loop.
2. the energy-saving safe control device of hot rolling high pressure descaling according to claim 1 system is characterized in that described Operations Analysis comprises central processing unit (CPU) and Programmable Logic Controller (PLC); CPU is connected to described steel billet tracking signal unit through the fieldbus unit, confirms the maximum water requirement of high pressure dephosphorization and the upper and lower bound of system pressure according to steel billet kind and rolling mill practice, calculates de-scaling water pressure setting value; Be sent to the setting value input of PLC; The system pressure of variable frequency pump feeds back to the feedback input end of PLC, carries out PID by PLC and regulates computing, and the water outlet frequency setting value of output variable frequency pump is sent to the variable-frequency motor driver element through the frequency conversion frequency to cell.
3. the energy-saving safe control device of hot rolling high pressure descaling according to claim 1 system is characterized in that described steel billet tracking signal unit comprises steel billet position signalling unit, steel billet number signal unit, de-scaling number of spots signal element and de-scaling dotted state signal element; Said each signal element is connected on the fieldbus unit; Described Operations Analysis is through said each signal element of fieldbus unit poll; Obtain the injection valve group switch state signal of steel billet position, quantity and de-scaling number of spots and de-scaling point on the hot rolling line in real time; And calculate every block of steel billet in view of the above and arrive the time of each de-scaling point and the unlatching sequential of injection valve group; Calculate the needed flow of each de-scaling point and de-scaling point combination, through the frequency conversion frequency to cell to the correction that feedovers of the rotating speed of variable frequency pump.
4. the energy-saving safe control device of hot rolling high pressure descaling according to claim 1 system is characterized in that described energy-saving safe control device is provided with the monitoring alarm unit, and described variable frequency pump operating state signal unit also comprises temperature detecting unit; Described monitoring alarm unit comprises controlling alarm unit and status display unit; Described controlling alarm unit obtains system running state through steel billet tracking signal unit and variable frequency pump operating state signal unit, and the system running state that obtains is presented at status display unit; Under the system exception state, described controlling alarm unit is through the status display unit display alarm information.
5. the energy-saving safe control device of hot rolling high pressure descaling according to claim 1 system is characterized in that described energy-saving safe control device is provided with manual control input block; Under the system exception state, described energy-saving safe control device can receive the de-scaling preselected signal through described manual control input block, manually controls the high pressure descaling system through control module according to the technological parameter of preliminary election.
6. the control method of a hot rolling high pressure descaling energy-saving safe control device is used for the energy-saving safe control device of the described hot rolling high pressure descaling of each claim system of claim 1-5, it is characterized in that may further comprise the steps:
S100) confirm the setting discharge pressure of system according to the high pressure descaling technological requirement, according to minimum process pressure and the requirement of minimum energy storage canister liquid level, initialization system upper limit of pressure and lower limit;
S200) detect the step of variable frequency pump running status in real time, wherein, comprise at least:
S220) through described pressure sensing cell real-time detecting system pressure,
S240) detect the liquid level of energy storage canister in real time through described Level Detection unit;
S300) the Programmable Logic Controller reading system detected pressure value of Operations Analysis compares with the setting discharge pressure in real time, according to the water outlet frequency setting value of pressure divergence through PID computing adjustment variable frequency pump, realizes constant pressure control;
S400) through described steel billet tracking signal unit, obtain the steel billet tracking signal in real time, wherein, the steel billet tracking signal comprises at least: the injection valve group switch state signal of the steel billet position on the hot rolling line, quantity and de-scaling number of spots and de-scaling point;
S500) according to the steel billet tracking signal obtained to the correction that feedovers of the frequency of variable frequency pump; Make variable frequency pump at idle condition frequency reducing energy-saving run; Described idle condition comprises the state that does not have steel billet on the hot rolling line, and steel billet is between the de-scaling point, injection valve group closing state.
7. the control method of hot rolling high pressure descaling energy-saving safe control device according to claim 6 is characterized in that the step S300 of described realization constant pressure control comprises following action:
S320) if system pressure less than the lower limit of setting pressure, then raises the water outlet frequency setting value of variable frequency pump, reach the upper limit of setting pressure up to system pressure, perhaps frequency reaches rated frequency;
S340) if system pressure greater than the upper limit of setting pressure, is then reduced the water outlet frequency setting value of variable frequency pump, reach the lower limit of setting pressure up to system pressure, perhaps frequency reaches the water outlet lower-frequency limit;
S360) if system pressure in the upper and lower bound interval of setting pressure, then keeps the water outlet frequency setting value of variable frequency pump constant.
8. the control method of hot rolling high pressure descaling energy-saving safe control device according to claim 6 is characterized in that described variable frequency pump frequency feedforward correction step S500 comprises following action:
S510) confirm that according to the steel billet tracking signal obtained steel billet begins de-scaling required de-scaling start-up time from coming out of the stove to;
S520), confirm the unit frequency of treating of system's idle condition down coversion pump, to guarantee in de-scaling start-up time, making variable frequency pump from treating that the unit frequency raising speed is to the water outlet frequency according to the variable-frequency motor response speed;
S530) get into roll change or breakdown maintenance state if steel billet tracking signal unit detects milling train, then under the situation that satisfies the requirement of minimum process pressure and minimum energy storage canister liquid level, make the variable frequency pump deceleration move according to the unit frequency of treating of idle condition;
S540) if milling train resumes operation, steel billet tracking signal unit detects the steel billet signal of coming out of the stove, and then makes variable frequency pump from treating that the unit frequency raising speed is to the water outlet frequency;
S550) if steel billet is between each de-scaling point, the injection valve group is in closed condition and does not carry out the de-scaling operation, then under the situation that satisfies the requirement of minimum process pressure and minimum energy storage canister liquid level, makes variable frequency pump move according to the water outlet lower-frequency limit;
S560) according to detected steel billet position, steel billet tracking signal unit; According to starting the variable-frequency motor raising speed pressure rising time in advance; To guarantee that steel billet is before arriving next de-scaling point; Variable frequency pump from water outlet lower-frequency limit raising speed to the water outlet frequency, wherein, described pressure rising time be variable frequency pump from water outlet lower-frequency limit raising speed to the required time of water outlet frequency;
S570) if 2 and the de-scaling simultaneously of above de-scaling point are arranged on the hot rolling line, then make variable frequency pump move, to keep de-scaling water requirement and energy storage canister moisture storage capacity balance according to rated frequency.
9. according to the control method of the described hot rolling high pressure descaling of each claim energy-saving safe control device of claim 6 to 8, it is characterized in that further comprising the steps of:
S600) receive the de-scaling preselected signal through manual control input block, start the high pressure descaling operation manually according to the descaling process parameter of preliminary election;
S620) if manually the control input block lead that receives the de-scaling preselected signal is not less than pressure rising time, then when receiving the de-scaling preselected signal, start the variable-frequency motor raising speed, make variable frequency pump from water outlet lower-frequency limit raising speed to the water outlet frequency;
S640) if manually the lead of control input block reception de-scaling preselected signal then improves the water outlet lower-frequency limit less than pressure rising time, make the energy-saving safe control device carry out constant pressure control to the water outlet frequency of variable frequency pump according to pressure feedback signal.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559439A (en) * | 2009-05-26 | 2009-10-21 | 广州金关节能科技发展有限公司 | Energy-saving control method for multi-section descaling and control device thereof |
| EP2174729A1 (en) * | 2008-10-07 | 2010-04-14 | Siemens Aktiengesellschaft | Ignition device with pump drive with variable speed |
| CN101844157A (en) * | 2010-04-28 | 2010-09-29 | 刘森 | Integrated roll line control-based hot rolling cooling water control method and system |
| UA56375U (en) * | 2009-01-09 | 2011-01-10 | Закрытое акционерное общество "Новокраматорский машиностроительный завод" | Method for control of hydraulic descaling device |
| CN202270744U (en) * | 2011-11-02 | 2012-06-13 | 攀钢集团攀枝花钢钒有限公司 | On-line monitoring system and hot continuous rolling high pressure water dephosphorization pump set equipment thereof |
-
2012
- 2012-07-26 CN CN2012102619483A patent/CN102755997A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2174729A1 (en) * | 2008-10-07 | 2010-04-14 | Siemens Aktiengesellschaft | Ignition device with pump drive with variable speed |
| UA56375U (en) * | 2009-01-09 | 2011-01-10 | Закрытое акционерное общество "Новокраматорский машиностроительный завод" | Method for control of hydraulic descaling device |
| CN101559439A (en) * | 2009-05-26 | 2009-10-21 | 广州金关节能科技发展有限公司 | Energy-saving control method for multi-section descaling and control device thereof |
| CN101844157A (en) * | 2010-04-28 | 2010-09-29 | 刘森 | Integrated roll line control-based hot rolling cooling water control method and system |
| CN202270744U (en) * | 2011-11-02 | 2012-06-13 | 攀钢集团攀枝花钢钒有限公司 | On-line monitoring system and hot continuous rolling high pressure water dephosphorization pump set equipment thereof |
Cited By (28)
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| CN105408036B (en) * | 2013-05-30 | 2017-12-08 | 首要金属科技奥地利有限责任公司 | Adjustable de-scaling device |
| US10449584B2 (en) | 2013-05-30 | 2019-10-22 | Primetals Technologies Austria GmbH | Adjustable descaler |
| CN105408036A (en) * | 2013-05-30 | 2016-03-16 | 首要金属科技奥地利有限责任公司 | Adjustable descaler |
| CN103302117A (en) * | 2013-06-21 | 2013-09-18 | 上海宝钢节能技术有限公司 | Single-pump descaling variable frequency control system and control method thereof |
| CN103302117B (en) * | 2013-06-21 | 2015-09-09 | 上海宝钢节能环保技术有限公司 | A kind of frequency-changing control system of single pump de-scaling and control method thereof |
| CN104624676A (en) * | 2013-11-15 | 2015-05-20 | 上海梅山钢铁股份有限公司 | Energy-saving configuration method of hot-rolling descaling device |
| CN104624676B (en) * | 2013-11-15 | 2017-02-01 | 上海梅山钢铁股份有限公司 | Energy-saving configuration method of hot-rolling descaling device |
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| CN104624677A (en) * | 2014-12-26 | 2015-05-20 | 山东钢铁股份有限公司 | Scale removing control method and device for hot-rolled steel production line |
| CN105834232A (en) * | 2015-01-15 | 2016-08-10 | 宝钢不锈钢有限公司 | High-pressure water descaling intelligent energy-saving system and control method thereof |
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| CN107249767A (en) * | 2015-02-09 | 2017-10-13 | 东芝三菱电机产业***株式会社 | Derusting system and its control device and control method |
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