Dynamic width adjustment control system of slab continuous casting crystallizer

Abstract

The embodiment of the utility model provides a slab continuous casting crystallizer dynamic width modulation control system which comprises a plurality of width modulation control subsystems, each width modulation control subsystem comprises an oil cylinder, an analog quantity output module, an analog quantity input module and a digital quantity output module, and each oil cylinder comprises a magnetic scale, a servo valve and an enabling valve; the magnetoscale is connected with the analog quantity input module, the servo valve is connected with the analog quantity output module and the analog quantity input module, and the enable valve is connected with the digital quantity output module. Independent control over a single oil cylinder is achieved through the analog quantity output modules, the analog quantity input modules and the digital quantity output modules, even if one analog quantity output module, the analog quantity input module or the digital quantity output module breaks down, other width modulation control subsystems are not affected, the reliability and stability of the system are greatly improved, the fault rate is reduced, and the system reliability is improved. And the whole system does not need to be disassembled and maintained on a large scale.

Description

Technical Field

[0001] The present application relates to the field of slab continuous casting crystallization, and in particular to a slab continuous casting crystallizer dynamic width adjustment control system. Background Art

[0002] The mold is the ingot-forming device within a continuous casting system and is one of its core components. Its function is to force cool the molten steel continuously injected into its inner cavity through a water-cooled copper wall, dissipating the heat and causing it to gradually solidify into a billet with the desired cross-sectional shape and a certain shell thickness. This billet, with its core still liquid, is then continuously pulled from the lower mouth of the mold. To pull out billets with the required cross-sectional shape, a dynamic width control system is required.

[0003] Existing dynamic width adjustment control systems primarily rely on the CPU to perform logical operations, read field sensor data, and control corresponding valves to ensure the width adjustment system remains stable at the set position. However, due to the presence of high-temperature molten steel and high-temperature steam in the operating environment, high temperatures, high humidity, and high-frequency vibration, the failure rate is high. Multiple width adjustment cylinders share a single input / output module, resulting in poor independence. Any external anomaly in an input or output signal can cause the entire module to malfunction or damage, potentially even leading to loss of control of other operating equipment. Utility Model Content

[0004] An embodiment of the present application provides a dynamic width adjustment control system for a slab continuous casting crystallizer, which enables each valve of each oil cylinder to be controlled by a separate module and relatively independently, thereby solving the problems of high failure rate, difficulty in troubleshooting and large impact of failures in the prior art.

[0005] The embodiment of the present application provides a slab continuous casting mold dynamic width adjustment control system, comprising a plurality of width adjustment control subsystems, each of which comprises an oil cylinder, an analog output module, an analog input module, and a digital output module, wherein the oil cylinder comprises a magnetic scale, a servo valve, and an enabling valve;

[0006] The magnetic ruler is connected to the analog input module, the servo valve is connected to the analog output module and the analog input module respectively, and the enabling valve is connected to the digital output module.

[0007] In a feasible implementation, the output end of the servo valve is connected to the analog output module, and the feedback end of the servo valve is connected to the analog input module.

[0008] In a feasible implementation, the dynamic width adjustment control system further includes a central controller, and the analog output module, the analog input module, and the digital output module are all connected to the central controller.

[0009] In a feasible implementation, the dynamic width adjustment control system further includes a power supply module, and the analog output module, the analog input module, the digital output module and the central controller are all connected to the power supply module.

[0010] In a feasible implementation, the analog output module, the analog input module, and the digital output module are respectively connected to the central controller via intermediate bundled cables.

[0011] In a feasible implementation, the dynamic bandwidth adjustment control system further includes an alarm module, and the alarm module is connected to the central controller and the power supply module respectively.

[0012] In a feasible implementation, the number of the width adjustment control subsystems is four.

[0013] An embodiment of the present application provides a dynamic width adjustment control system for a slab continuous casting crystallizer, which divides the dynamic width adjustment control system into multiple width adjustment control subsystems. Each width adjustment control subsystem corresponds to an oil cylinder, and independent control of a single oil cylinder is achieved through an analog output module, an analog input module, and a digital output module. Even if one of the analog output modules, analog input modules, or digital output modules fails, or even one of the width adjustment control subsystems fails, it will not affect other width adjustment control subsystems, thereby greatly improving the reliability and stability of the system, reducing the failure rate, and eliminating the need for large-scale disassembly and maintenance of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a dynamic width adjustment control system for a slab continuous casting crystallizer provided in one embodiment of the present application;

[0015] Figure 2 yes Figure 1 A schematic diagram of the structure of one of the width adjustment control subsystems;

[0016] Figure 3 This is a schematic diagram of the module connections of the dynamic width adjustment control system of the slab continuous casting crystallizer provided in one embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0018] In the slab continuous casting process, precise control of the mold bottom opening width is crucial to ensuring the quality of the cast slab. This is achieved primarily by adjusting the positions of the oil cylinders located on either side of the mold bottom opening to maintain the mold bottom opening width constant at a preset value. Each cylinder integrates several key components for precise control: a magnetic scale for accurately measuring the cylinder's current position (or, in other words, the cylinder's current extension), a servo valve (whose operating principle depends on the target position set by the magnetic scale. The servo valve's output is calculated through a built-in program to precisely adjust the cylinder's position to achieve the mold bottom opening width adjustment), and an enabling valve (essentially a valve that controls the flow of oil in the cylinder pipe. Once the mold width has been calibrated and confirmed to be correct, the enabling valve remains energized, maintaining the cylinder pipe's unobstructed state and ensuring a continuous and stable oil supply).

[0019] However, in the existing technology, there are significant reliability risks. Specifically, the two servo valves share an analog output AO (Analog Output) module and an analog input AI (Analog Input) module. At the same time, the two enabling valves also share a digital output DO (Digital Output) module. This design leads to poor relative independence between the components. Once any input or output signal encounters an external anomaly, such as a short circuit, ground fault, etc., it may affect the entire system, causing failures or even damage, and thus affecting other modules that are operating normally. Due to the lack of necessary isolation between modules, once a problem occurs in a module, it will not be possible to accurately adjust the cylinder action according to the module output signal, resulting in abnormal changes in the mold taper, seriously affecting the quality of the ingot and production efficiency.

[0020] In order to overcome the above-mentioned defects, the present application proposes an improved solution, which is described below in conjunction with specific embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of a dynamic width adjustment control system for a slab continuous casting crystallizer provided in one embodiment of the present application. Figure 2 yes Figure 1 The structural diagram of one of the width adjustment control subsystems, Figure 3 This is a schematic diagram of the module connection of the slab continuous casting mold dynamic width adjustment control system provided by an embodiment of the present application. Figure 1-3 As shown, the embodiment of the present application provides a slab continuous casting crystallizer dynamic width adjustment control system, including multiple width adjustment control subsystems, each of the width adjustment control subsystems includes an oil cylinder, an analog output module, an analog input module, and a digital output module, wherein the oil cylinder includes a magnetic scale, a servo valve, and an enabling valve;

[0022] The magnetic ruler is connected to the analog input module, the servo valve is connected to the analog output module and the analog input module respectively, and the enabling valve is connected to the digital output module.

[0023] In some examples, the output end of the servo valve is connected to the analog output module, and the feedback end of the servo valve is connected to the analog input module.

[0024] In some examples, the dynamic width adjustment control system further includes a central controller, and the analog output module, the analog input module, and the digital output module are all connected to the central controller.

[0025] During implementation, the number and location of the required cylinders are first determined based on the mold size and process requirements. Each cylinder is then equipped with an independent analog output (AO) module, analog input (AI) module, and digital output (DO) module. In other words, each cylinder corresponds to a width adjustment control subsystem. These modules are connected to the central controller via dedicated cables or buses, enabling real-time data transmission and the issuance of control commands.

[0026] During the control process, the central controller calculates the required position and speed for each cylinder based on the difference between the position information fed back by the magnetic scale and the preset target position. It then sends the corresponding control signal to the servo valve via the analog output (AO) module. Upon receiving the control signal, the servo valve adjusts its valve opening and closing state to adjust the cylinder position until the cylinder reaches the preset target position. Simultaneously, the analog input (AI) module receives feedback signals from the magnetic scale and servo valve in real time and transmits them to the central controller for monitoring and analysis.

[0027] In the above embodiment, the control circuit for each valve is isolated within a separate module, and the multiple subsystems are independent of each other. Even if a module within a subsystem fails, the normal operation of other subsystems will not be affected. This not only reduces the failure rate but also facilitates troubleshooting and maintenance, ensuring precise control of the mold width during the slab continuous casting process, effectively preventing the degradation of cast slab quality caused by control system failures, and providing a solid technical guarantee for the efficient and stable operation of the continuous casting process.

[0028] In some examples, the dynamic width adjustment control system further includes a power supply module, and the analog output module, the analog input module, the digital output module, and the central controller are all connected to the power supply module.

[0029] It is easy to understand that the power supply module provides stable and reliable power supply for the analog output module, analog input module, digital output module and central controller, ensuring the stable operation of each module in a complex industrial environment.

[0030] In some examples, the analog output module, the analog input module, and the digital output module are respectively connected to the central controller via intermediate bundled cables.

[0031] It should be noted that this connection method not only improves the reliability and stability of data transmission, but also facilitates system maintenance and expansion.

[0032] In some examples, the dynamic width adjustment control system further includes an alarm module, which is connected to the central controller and the power supply module respectively.

[0033] When an abnormality or failure occurs in the system, the central controller will immediately send a signal to the alarm module, triggering the alarm mechanism so that operators can take timely measures to ensure production safety.

[0034] If the central controller detects any anomalies or deviations during monitoring and analysis, it will immediately take measures to make adjustments or issue an alarm, for example, interrupting the control of each cylinder.

[0035] In some examples, the number of the width modulation control subsystems is four.

[0036] Compared with the prior art, the slab continuous casting mold dynamic width adjustment control system provided in the embodiments of the present application has the following beneficial effects:

[0037] 1. Modular Design: Each cylinder's output signal is directly connected to an independent analog output (AO) module, while its feedback signal corresponds to an independent analog input (AI) module. Similarly, each enabling valve is connected to an independent digital output (DO) module. This modular design ensures that each cylinder's control circuit is isolated within a separate module, achieving a high degree of independence.

[0038] 2. Fault isolation: Since each control component is equipped with an independent module, even if a module fails, it will not affect the normal operation of other modules. This design greatly improves the reliability and stability of the system and reduces the failure rate.

[0039] 3. Easy maintenance: The modular design also makes system maintenance simpler and more convenient. Once a module fails, it can be quickly located and replaced without the need for large-scale disassembly and repair of the entire system.

[0040] 4. Improved control accuracy: Since the control circuit of each cylinder is independently controlled, the position of the cylinder can be adjusted more accurately to maintain a constant mold width. This helps improve the quality of the cast billet and production efficiency.

[0041] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0042] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A slab continuous casting mold dynamic width adjustment control system, characterized in that: It includes multiple width adjustment control subsystems, each of which includes an oil cylinder, an analog output module, an analog input module, and a digital output module, wherein the oil cylinder includes a magnetic scale, a servo valve, and an enabling valve; The magnetic ruler is connected to the analog input module, the servo valve is connected to the analog output module and the analog input module respectively, and the enabling valve is connected to the digital output module.

2. The slab continuous casting mold dynamic width adjustment control system according to claim 1, characterized in that: The output end of the servo valve is connected to the analog output module, and the feedback end of the servo valve is connected to the analog input module.

3. The slab continuous casting mold dynamic width adjustment control system according to claim 1 or 2, characterized in that: The dynamic width adjustment control system further includes a central controller, and the analog output module, the analog input module and the digital output module are all connected to the central controller.

4. The slab continuous casting mold dynamic width adjustment control system according to claim 3, characterized in that: The dynamic width adjustment control system further includes a power supply module, and the analog output module, the analog input module, the digital output module and the central controller are all connected to the power supply module.

5. The slab continuous casting mold dynamic width adjustment control system according to claim 3, characterized in that: The analog output module, the analog input module and the digital output module are respectively connected to the central controller via intermediate bundled cables.

6. The slab continuous casting mold dynamic width adjustment control system according to claim 4, characterized in that: The dynamic width adjustment control system further includes an alarm module, which is connected to the central controller and the power supply module respectively.

7. The slab continuous casting mold dynamic width adjustment control system according to claim 1, characterized in that: The number of the width adjustment control subsystems is four.

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