A multi-lateral performance controlled high-pressure water descaling spray control system and method

Abstract

The present invention discloses a multilateral performance-controlled high-pressure water descaling spray control system and method, which belongs to the technical field of steel production and solves the technical problem of unstable operation of existing high-pressure water descaling spray systems. The method is as follows: obtaining a tracking signal when a steel billet is unfurnaced and using it as a head-end pulse tracking signal; obtaining a steel signal of the 1# rolling mill at the rolling line entrance and using it as a head-end pulse tracking signal; triggering the reading of an internal clock of the high-pressure water descaling spray control system through the head-end pulse tracking signal and using it as a head-end data variable; triggering the reading of an internal clock of the high-pressure water descaling spray control system through the head-end pulse tracking signal and using it as a head-end data variable; performing time deviation processing on the head-end data variable and the head-end data variable to obtain time deviation compensation; and controlling the operation of the high-pressure water descaling spray control system according to the head-end pulse tracking signal, the head-end pulse tracking signal and the time deviation compensation.

Description

Technical Field

[0001] The present invention relates to the technical field of steel production, and more particularly to a multi-lateral performance-regulated high-pressure water descaling spraying control system and method. Background Art

[0002] The high-pressure water descaling spray system after the steel rolling mill is a critical control system in the rolling production process. Since its commissioning, the system has initially experienced unstable operation. Production has been severely impacted by frequent steel jams during billet removal, and the spraying operation has been uncontrolled. The associated control chain and control methods were unable to fully meet the needs of on-site production processes, resulting in varying degrees of wear on the roll equipment and pollution to the production environment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide a method for controlling high-pressure water descaling spraying with multilateral performance regulation.

[0004] The second object of the present invention is to provide a high-pressure water descaling spray control system with multilateral performance regulation.

[0005] In order to achieve the above-mentioned first objective, the present invention provides a method for controlling high-pressure water descaling spraying with multilateral performance regulation, comprising:

[0006] Obtain the tracking signal when the billet comes out of the furnace and use it as the head-end pulse tracking signal;

[0007] Obtain the steel signal of the No. 1 rolling mill at the rolling line entrance and use it as the end pulse tracking signal;

[0008] The internal clock of the high-pressure water descaling spray control system is read through the head-end pulse tracking signal trigger and used as the head-end data variable;

[0009] The internal clock of the high-pressure water descaling spray control system is read through the terminal pulse tracking signal trigger and used as the terminal data variable;

[0010] Performing time deviation processing on the head-end data variables and the terminal data variables to obtain time deviation compensation;

[0011] The operation of the high-pressure water descaling spray control system is controlled according to the head-end pulse tracking signal, the end-end pulse tracking signal and the time deviation compensation.

[0012] As a further improvement, when the head-end pulse tracking signal is triggered, the internal clock of the high-pressure water descaling spray control system is read and assigned to a double integer data variable, and then the double integer data variable is converted into a floating-point data variable through the data type and used as the head-end data variable;

[0013] When the terminal pulse tracking signal is triggered, the internal clock of the high-pressure water descaling spray control system is read and assigned to a double integer data variable, and then the double integer data variable is converted into a floating-point data variable through the data type and used as the terminal data variable;

[0014] Perform time deviation processing on the head-end data variable and the end-end data variable to obtain an intermediate floating-point data variable based on milliseconds;

[0015] The intermediate floating-point data variable is then converted into a floating-point data variable based on seconds and used as time deviation compensation.

[0016] Furthermore, when the head-end pulse tracking signal appears, the high-pressure water descaling spray control system is controlled to start spraying;

[0017] When the head-end pulse tracking signal disappears, the high-pressure water descaling spray control system is controlled to stop spraying after the delay time deviation is compensated.

[0018] Further, when the time deviation compensation is less than the set process time, the set process time is used as the time deviation compensation.

[0019] Furthermore, the interlocking conditions for the automatic high-pressure water descaling spray control system to stop spraying include the furnace roller being in a zero speed state, the time deviation compensation delay arriving, and the 1# rolling mill of the rolling line entrance rolling mill having no steel signal.

[0020] Furthermore, the interlocking conditions for controlling the normal spraying of the high-pressure water descaling spray control system include non-emergency stop state, normal water inlet pressure, normal liquid level, normal frequency converter, open inlet valve, open outlet valve, normal temperature, normal main pump, and normal operation state of the electronic control system of the high-pressure water descaling spray control system.

[0021] Furthermore, a profibus network communication is established between the rolling line control system and the high-pressure water descaling spray control system, and the high-pressure water descaling spray control system is set as a slave station of the rolling line control system; the emergency stop point, water inlet pressure point, liquid point point, inverter ready and running point, inlet valve opening point, outlet valve opening point, temperature point, main pump ready and running point signals of the high-pressure water descaling spray control system are fed back to the rolling line control system, and visual control is performed on the control screen.

[0022] Furthermore, a high-speed data acquisition system is used to collect the emergency stop point, inlet water pressure value, liquid level value, inverter ready and operating point, inlet valve opening point, outlet valve opening point, temperature value, each pump operating parameter, each valve opening status, on-site remote control position, descaling control mode, main pump solenoid valve working status, water supply solenoid valve working status of the high-pressure water descaling spray control system, and perform real-time monitoring of big data; and synchronously query historical operation data.

[0023] Furthermore, an "operation switch" selection box is set on the control screen; when manual descaling is selected, the descaling pump descales directly without the need for a thermal detection signal; when automatic descaling is selected, the descaling pump starts descaling after receiving a descaling thermal detection signal, and stops descaling when the thermal detection signal disappears; when stop descaling is selected, the manual descaling button and the automatic descaling button are reset to stop descaling.

[0024] In order to achieve the above-mentioned second objective, the present invention provides a high-pressure water descaling spray control system with multilateral performance control, including a high-pressure water descaling spray control system, further comprising:

[0025] Hot metal detector unit, used to obtain tracking signals when the billet comes out of the furnace;

[0026] The main control unit is used to obtain the steel signal of the 1# rolling mill at the rolling line entrance; and control the operation of the high-pressure water descaling spray control system according to the above-mentioned multilateral performance regulation high-pressure water descaling spray control method.

[0027] Beneficial effects

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. The present invention can make the high-pressure water descaling spray control system run stably. When the furnace roller is running normally at a non-zero speed and the billet is normally biting into the rough rolling stand, the high-pressure water descaling spray control system can spray normally. If the billet is removed or the spray device is stuck, the high-pressure water descaling spray control system can stop spraying in time, thereby improving the accuracy of the spraying water. It can operate stably for a long time while meeting the production process, save a lot of water resources and electricity, avoid different degrees of wear of on-site rolling equipment, and improve the on-site production environment and equipment operation environment.

[0030] 2. The present invention establishes a profibus network communication between the rolling line control system and the high-pressure water descaling spray control system, realizes point-to-point communication between the analog signal points and the digital / switch signal points of the high-pressure water descaling spray control system, and synchronizes the analog signal points and the digital / switch signal points of the high-pressure water descaling spray control system for visual control on the screen, thereby realizing dynamic or static optimal control of the high-pressure water descaling spray control system.

[0031] 3. The present invention collects all-round analog signal points and digital / switch signal points of the high-pressure water descaling spray control system and synchronizes them to a high-speed data acquisition system, allowing for convenient and quick query of historical operating data and multi-angle processing of problem fault points in the high-pressure water descaling spray control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a diagram of the architecture of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0034] See Figure 1 A multi-lateral performance-controlled high-pressure water descaling spraying control method, comprising:

[0035] Acquire a tracking signal when the billet is out of the furnace and use it as a head-end pulse tracking signal. Specifically, an infrared detection signal from a hot metal detector unit is used as the tracking signal when the billet is out of the furnace.

[0036] Obtain the steel signal of the No. 1 rolling mill at the rolling line entrance and use it as the end pulse tracking signal;

[0037] The internal clock of the high-pressure water descaling spray control system is read by triggering the head-end pulse tracking signal and used as the head-end data variable. Specifically, the system internal clock is read by calling the system function data block SFC64, with milliseconds as the time base, and triggered by the internal clock interrupt;

[0038] The internal clock of the high-pressure water descaling spray control system is read through the terminal pulse tracking signal trigger and used as the terminal data variable;

[0039] Performing time deviation processing on the head-end data variables and the terminal data variables to obtain time deviation compensation;

[0040] The high-pressure water descaling spray control system operates according to the first-end pulse tracking signal, the last-end pulse tracking signal, and time deviation compensation. When the first-end pulse tracking signal appears, the high-pressure water descaling spray control system starts spraying; when the first-end pulse tracking signal disappears, the high-pressure water descaling spray control system stops spraying after delay time deviation compensation.

[0041] It can ensure that the high-pressure water descaling spray control system can spray normally when the furnace roller is running at a normal non-zero speed and when the billet is normally bitten into the rough rolling stand; if the billet is removed or the spray device is stuck, the high-pressure water descaling spray control system can stop spraying in time, thereby improving the accuracy of the spraying water, and operating stably for a long time while meeting the production process, saving a lot of water resources and electricity, avoiding different degrees of wear of the on-site rolling equipment, and improving the on-site production environment and equipment operation environment.

[0042] When the head-end pulse tracking signal is triggered, the internal clock of the high-pressure water descaling spray control system is read and assigned to a double integer data variable, which is then converted into a floating-point data variable a_1(t) through the data type and used as the head-end data variable.

[0043] When the terminal pulse tracking signal is triggered, the internal clock of the high-pressure water descaling spray control system is read and assigned to a double integer data variable, which is then converted into a floating-point data variable a_2(t) through the data type and used as the terminal data variable.

[0044] The time deviation processing is performed on the head-end data variable and the end-end data variable to obtain the intermediate floating-point data variable a_3(t) based on milliseconds.

[0045] The intermediate floating-point data variable a_3(t) is then converted into a floating-point data variable a_4(t) based on seconds and used as time deviation compensation.

[0046] When the time deviation compensation is less than the set process time, the set process time will be used as the time deviation compensation to ensure that the descaling spray meets the process requirements. For example, if the set process time is 3 seconds, the spray time needs to be delayed by 3 seconds to meet the process requirements, and the water consumption is minimized.

[0047] The interlocking conditions for stopping spraying of the automatic high-pressure water descaling spray control system include that the furnace roller is in zero speed state, the time deviation compensation delay arrives, and there is no steel signal from the 1# rolling mill of the rolling line entrance rolling mill.

[0048] The interlocking conditions for the normal spraying of the high-pressure water descaling spray control system include non-emergency stop state, normal inlet water pressure, normal liquid level, normal frequency converter, open inlet valve, open outlet valve, normal temperature, normal main pump, and normal operation of the electronic control system of the high-pressure water descaling spray control system. This makes the high-pressure water descaling spray control system closed-loop controllable.

[0049] Establish PROFIBUS network communication between the rolling mill control system and the high-pressure water descaling spray control system. Configure the high-pressure water descaling spray control system as a slave station of the rolling mill control system. Feedback from the high-pressure water descaling spray control system's emergency stop point, water inlet pressure point, liquid level point, inverter ready and run points, inlet valve opening point, outlet valve opening point, temperature point, and main pump ready and run points is provided to the rolling mill control system, allowing for visual control on the control screen. Simultaneously, the roughing mill remote cabinet output Q is connected to the normally closed control point of the intermediate relay in the local remote cabinet of the high-pressure water descaling pump room hydraulic station to control the high-pressure water descaling spray stop and spray operation.

[0050] A high-speed data acquisition system collects the emergency stop point, inlet water pressure, liquid level, inverter ready and operating points, inlet valve opening point, outlet valve opening point, temperature, pump operating parameters (including lubricating oil temperature, lubricating oil pressure, operating frequency, operating current, inlet and outlet water pressure, water tank level, and thermal detection signal), valve opening status, local remote control position, descaling control mode, main pump solenoid valve operating status, and water supply solenoid valve operating status of the high-pressure water descaling spray control system. This system then performs real-time big data monitoring and allows for simultaneous query of historical operating data. This improves the convenience of identifying and addressing comprehensive issues in the high-pressure water descaling spray control system.

[0051] Set the "Operation Switch" selection box on the control screen; when manual descaling is selected, the descaling pump descales directly without the need for a thermal detection signal; when automatic descaling is selected, the descaling pump starts descaling after receiving the descaling thermal detection signal, and stops descaling when the thermal detection signal disappears; when stop descaling is selected, reset the manual descaling button and the automatic descaling button to stop descaling.

[0052] Specifically, when the high-pressure water descaling spray control system is in an abnormal working condition, the descaling thermal detection signal is abnormal and cannot detect the signal, or the high-pressure water descaling spray device is blocked by scale slag, set the "operation switch" selection box to select manual descaling to meet the production process; under normal rolling conditions, in the normal production rhythm, the descaling thermal detection signal and the steel signal at the rolling mill entrance are normal, the steel billet is normally bitten into the rolling mill roll, and automatic descaling is selected; when the production rhythm stops, the rolling system is in the state of stopping for maintenance, the heating furnace is waiting for gas, etc., choose to stop descaling, reset the manual descaling button and the automatic descaling button, and stop descaling.

[0053] Controls are controlled on the screen. Before starting the high-pressure water descaling spray control system, perform an emergency stop, ensure normal inlet water pressure and liquid level, ensure the VFD is functioning properly, ensure the inlet and outlet valves are open, and ensure the temperature and main pump are functioning properly. Open the pneumatic valves: Open / Close the outlet pneumatic valve for pump 1, and open / Close the outlet pneumatic valve for pump 2. Before starting the main pump, the corresponding pneumatic valve must be opened; otherwise, the main pump will not be able to start. Start either booster pump 1 or 2. A green signal on the booster pump indicates that it is allowed to start. A red signal indicates that the booster pump cannot start. Manual shutoff valves are located at the inlet and outlet of the booster pump.

[0054] Through on-screen control, the main pump start-up condition indicator in the high-pressure water descaling spray control system illuminates, indicating the pump can be started. During pump startup, the oil pump running, fan running, main pump starting, and inverter running indicators light up. After the pump starts, the motor set frequency, motor operating frequency, lubricating oil temperature, lubricating oil pressure, and inverter cabinet operating indicators light up. Through on-screen control, all interlocking conditions are met for the main pump to start and operate normally.

[0055] Alarm tracking: During the operation of the high-pressure water descaling spray control system, the alarm is tracked in real time for abnormal water inlet pressure, abnormal liquid level, inverter fault alarm, inlet valve not opening normally, outlet valve not opening normally, motor temperature exceeding the normal standard range, motor operating frequency sudden change, booster pump abnormal shutdown, main pump abnormal shutdown operating conditions. The alarm screen of the high-pressure water descaling control system is tracked in real time and the alarm items are tracked on the main screen. Red items are used to remind on-site process operators to stop the high-pressure water descaling spray control system in time.

[0056] Through alarm tracking, multiple abnormal working conditions that occur during the operation of the high-pressure water descaling spray control system are recorded in real time, assisting on-site process operators to stop the high-pressure water descaling spray operation, protect the high-pressure water descaling spray device and related electronic control equipment and mechanical fluid equipment, ensure equipment stability and ensure on-site production stability.

[0057] A multi-lateral performance controlled high-pressure water descaling spray control system, comprising a high-pressure water descaling spray control system, further comprising:

[0058] Hot metal detector unit, used to obtain tracking signals when the billet comes out of the furnace;

[0059] The main control unit is used to obtain the steel signal of the 1# rolling mill at the rolling line entrance; and control the operation of the high-pressure water descaling spray control system according to the above-mentioned multilateral performance regulation high-pressure water descaling spray control method.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A multi-lateral performance control high-pressure water descaling spraying control method, characterized in that: include: Obtain the tracking signal when the billet comes out of the furnace and use it as the head-end pulse tracking signal; Obtain the steel signal of the No. 1 rolling mill at the rolling line entrance and use it as the end pulse tracking signal; The internal clock of the high-pressure water descaling spray control system is read through the head-end pulse tracking signal trigger and used as the head-end data variable; The internal clock of the high-pressure water descaling spray control system is read through the terminal pulse tracking signal trigger and used as the terminal data variable; Performing time deviation processing on the head-end data variables and the terminal data variables to obtain time deviation compensation; The operation of the high-pressure water descaling spray control system is controlled according to the head-end pulse tracking signal, the end-end pulse tracking signal and the time deviation compensation.

2. A method for controlling the descaling spraying of high-pressure water with multilateral performance regulation according to claim 1, characterized in that: When the head-end pulse tracking signal is triggered, the internal clock of the high-pressure water descaling spray control system is read and assigned to a double integer data variable, and then the double integer data variable is converted into a floating-point data variable through the data type and used as the head-end data variable; When the terminal pulse tracking signal is triggered, the internal clock of the high-pressure water descaling spray control system is read and assigned to a double integer data variable, and then the double integer data variable is converted into a floating-point data variable through the data type and used as the terminal data variable; Perform time deviation processing on the head-end data variable and the end-end data variable to obtain an intermediate floating-point data variable based on milliseconds; The intermediate floating-point data variable is then converted into a floating-point data variable based on seconds and used as time deviation compensation.

3. A method for controlling the descaling spraying of high-pressure water with multilateral performance regulation according to claim 1, characterized in that: When the pulse tracking signal appears at the head end, the high-pressure water descaling spray control system starts spraying; When the head-end pulse tracking signal disappears, the high-pressure water descaling spray control system is controlled to stop spraying after the delay time deviation is compensated.

4. A method for controlling the descaling spraying of high-pressure water with multilateral performance regulation according to claim 1, characterized in that: When the time deviation compensation is less than the set process time, the set process time is used as the time deviation compensation.

5. A method for controlling the descaling spraying of high-pressure water with multilateral performance regulation according to claim 1, characterized in that: The interlocking conditions for stopping spraying of the automatic high-pressure water descaling spray control system include that the furnace roller is in zero speed state, the time deviation compensation delay arrives, and there is no steel signal from the 1# rolling mill of the rolling line entrance rolling mill.

6. A method for controlling the descaling spraying of high-pressure water with multilateral performance regulation according to claim 1, characterized in that: The interlocking conditions for controlling the normal spraying of the high-pressure water descaling spray control system include non-emergency stop state, normal water inlet pressure, normal liquid level, normal frequency converter, open inlet valve, open outlet valve, normal temperature, normal main pump, and normal operation of the electronic control system of the high-pressure water descaling spray control system.

7. A method for controlling the multi-lateral performance-controlled high-pressure water descaling spraying according to any one of claims 1 to 6, characterized in that: Establish profibus network communication between the rolling line control system and the high-pressure water descaling spray control system, and set the high-pressure water descaling spray control system as a slave station of the rolling line control system; feed back the signals of the emergency stop point, water inlet pressure point, liquid point point, inverter ready and running point, inlet valve opening point, outlet valve opening point, temperature point, main pump ready and running point of the high-pressure water descaling spray control system to the rolling line control system, and perform visual control on the control screen.

8. A method for controlling the multi-lateral performance-controlled high-pressure water descaling spraying according to claim 7, characterized in that: A high-speed data acquisition system is used to collect the emergency stop point, inlet water pressure value, liquid level value, inverter ready and running point, inlet valve opening point, outlet valve opening point, temperature value, each pump operating parameter, each valve opening status, local remote control position, descaling control mode, main pump solenoid valve working status, water supply solenoid valve working status of the high-pressure water descaling spray control system, and perform real-time big data monitoring; as well as synchronous query of historical operation data.

9. A method for controlling the multi-lateral performance-controlled high-pressure water descaling spraying according to claim 7, characterized in that: Set the "Operation Switch" selection box on the control screen; when manual descaling is selected, the descaling pump descales directly without the need for a thermal detection signal; when automatic descaling is selected, the descaling pump starts descaling after receiving the descaling thermal detection signal, and stops descaling when the thermal detection signal disappears; when stop descaling is selected, reset the manual descaling button and the automatic descaling button to stop descaling.

10. A multi-lateral performance controlled high-pressure water descaling spray control system, comprising a high-pressure water descaling spray control system, characterized in that: Also includes: Hot metal detector unit, used to obtain tracking signals when the billet comes out of the furnace; The main control unit is used to obtain the steel signal from the No. 1 rolling mill at the rolling line entrance; And the operation of the high-pressure water descaling spray control system is controlled according to the multilateral performance regulation high-pressure water descaling spray control method described in any one of claims 1 to 9.

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