A post-rolling cooling system for a tear-resistant thick steel plate

Abstract

This invention discloses a post-rolling cooling system for tear-resistant thick steel plates, relating to the field of thick steel plate production technology. It includes: a main cooling module for gradient cooling of the high-temperature post-rolled thick steel plate in different zones, forming a precise water curtain through multiple nozzle assemblies; a water supply and treatment module for providing cooling water to the main cooling module through water filtration and pressure regulation; a detection and control module for real-time acquisition of steel plate temperature and cooling water flow rate parameters, automatically adjusting the cooling strategy based on a preset cooling curve; and an auxiliary adjustment module for edge shielding and side spray compensation based on the temperature difference between the edge and center of the steel plate. This invention effectively reduces thermal stress and improves the tear resistance of the steel plate through gradient cooling in different zones and precise control of the cooling rate. It also reduces resource waste and lowers production costs through water circulation, collects multi-dimensional data in real-time, dynamically adjusts the cooling strategy, and has fault diagnosis and data storage functions to ensure precise cooling and stable steel plate quality.

Description

Technical Field

[0001] This invention relates to the field of thick steel plate production technology, specifically to a post-rolling cooling system for tear-resistant thick steel plates. Background Technology

[0002] In the production of thick steel plates, post-rolling cooling is a crucial process that determines the final mechanical properties of the steel plate. After rolling, thick steel plates need to be cooled rapidly to refine the grains and control the phase transformation structure. However, traditional cooling systems have many technical drawbacks and cannot meet the high standards required for tear resistance, including: poor cooling uniformity, high risk of stress concentration; traditional cooling systems often use a single cooling zone or fixed nozzle layout, which cannot adjust the intensity according to the cooling needs of different temperature ranges of the steel plate; insufficient stability of the water supply system, resulting in large fluctuations in cooling effect; traditional systems rely heavily on manual monitoring of steel plate temperature, with data acquisition being delayed and inaccurate, making it impossible to adjust cooling parameters in real time; and the cooling water in traditional cooling systems is mostly for single use, resulting in low water recycling rate.

[0003] As high-end manufacturing demands increasingly higher tear resistance for thick steel plates, traditional cooling systems can no longer meet the technical requirements. There is an urgent need for a post-rolling cooling system that can achieve precise cooling control, stable water supply, intelligent detection, and high efficiency and energy saving to solve the above-mentioned technical pain points. Summary of the Invention

[0004] The purpose of this invention is to provide a post-rolling cooling system for tear-resistant thick steel plates in order to solve the problems mentioned above.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A post-rolling cooling system for tear-resistant thick steel plates includes: a cooling main module, a water supply and treatment module, a detection and control module, and an auxiliary adjustment module;

[0007] The cooling main module is used to perform regional gradient cooling of high-temperature thick steel plates after rolling. It forms a precise water curtain through multiple sets of nozzle assemblies to control the cooling rate of the steel plate in order to improve its tear resistance.

[0008] The water supply treatment module is used to provide a stable and clean cooling water source for the main cooling module. Through water filtration and pressure regulation, it ensures the continuity of the cooling process and the cooling effect.

[0009] The detection and control module is electrically connected to the cooling main module and the water supply treatment module. The detection and control module is used to collect the steel plate temperature and cooling water flow rate parameters in real time and automatically adjust the cooling strategy based on the preset cooling curve.

[0010] The auxiliary adjustment module is electrically connected to the cooling main module and the detection and control module. The auxiliary adjustment module is used to perform edge shielding and side spray compensation according to the temperature difference between the edge and the middle of the steel plate, so as to avoid the risk of steel plate tearing caused by uneven cooling.

[0011] Preferably, the cooling main module includes:

[0012] Based on the temperature distribution characteristics of rolled thick steel plates, the cooling zone is divided into a high-temperature rapid cooling zone, a medium-temperature transitional cooling zone, and a low-temperature precision cooling zone, with each zone independently controlling the cooling intensity.

[0013] The nozzle arrangement unit uses high-density fan-shaped nozzles in the high-temperature rapid cooling zone, medium-density conical nozzles in the medium-temperature transition cooling zone, and low-density direct-fire nozzles in the low-temperature precision cooling zone. The nozzle spacing in each zone can be adjusted according to the thickness of the steel plate.

[0014] The water curtain control unit adjusts the inlet water pressure of the nozzles in each area through a variable frequency water pump, and controls the opening and closing sequence of the nozzles with a solenoid valve to form a continuous and uniform cooling water curtain, ensuring that the temperature gradient on the steel plate surface is stable at 5-10℃ / s.

[0015] Preferably, the cooling main module further includes:

[0016] The temperature feedback unit is equipped with an infrared high-temperature detector at the outlet of each cooling zone to collect the surface temperature data of the steel plate in real time and transmit the data to the detection and control module.

[0017] The cooling intensity adjustment unit, based on the temperature data collected by the temperature feedback unit, dynamically adjusts the cooling intensity of each area by adjusting the nozzle inlet water pressure (adjustment range 0.3-1.2MPa) and the roller conveyor speed (adjustment range 0.5~2m / s), so that the temperature difference between the core and surface of the steel plate is controlled within 30℃.

[0018] Preferably, the water supply treatment module includes:

[0019] The water storage unit is equipped with a large-capacity water tank. A liquid level sensor is installed inside the water tank to monitor the water level in real time. When the water level is lower than the preset value (lower than 1 / 3 of the total volume of the water tank), the water replenishment device is automatically activated.

[0020] The water filtration unit adopts a three-stage filtration structure. The first stage is a coarse filter (50μm pore size) to filter large particulate impurities. The second stage is a precision filter (5μm pore size) to filter fine impurities. The third stage is an activated carbon filter to adsorb organic matter in the water, ensuring that the impurity content in the cooling water is less than 5mg / L.

[0021] The pressure stabilization unit is a constant pressure variable frequency pump installed on the water supply pipeline. Combined with a pressure sensor, it monitors the water pressure in the pipeline in real time and stabilizes the water pressure within a preset range (0.4-1.0MPa) to avoid water pressure fluctuations affecting the stability of the cooling water curtain.

[0022] Preferably, the water supply treatment module further includes:

[0023] The water temperature regulation unit is equipped with heating tubes and cooling coils in the water storage tank. It collects water temperature data through temperature sensors. When the water temperature is below 15℃, the heating tubes are activated, and when it is above 30℃, the cooling coils are activated to control the water temperature between 18-25℃, so as to avoid condensation on the steel plate surface due to excessively low water temperature and reduced cooling efficiency due to excessively high water temperature.

[0024] The water recycling unit has a water collection tank installed below the cooling area. The water collection tank is equipped with a filter screen and a sedimentation tank to perform preliminary filtration and sedimentation of the used cooling water. The treated cooling water is then transported to a storage tank for secondary use.

[0025] Preferably, the detection control module includes:

[0026] In addition to collecting data on steel plate temperature and cooling water flow rate, the parameter acquisition unit also collects internal stress data of the steel plate during the cooling process through a stress sensor and warpage data of the steel plate through a displacement sensor.

[0027] The data processing unit uses a PLC controller to analyze and process the collected multi-dimensional data, and establishes a correlation model between steel plate temperature, stress, warpage and cooling parameters (pressure, speed, water temperature).

[0028] The strategy generation unit generates the optimal cooling control strategy based on the correlation model and preset tear resistance performance indicators (requiring the steel plate to have a tensile strength ≥600MPa and an elongation ≥18%), and sends the control commands to the cooling main module and the water supply treatment module.

[0029] Preferably, the detection control module further includes:

[0030] The fault diagnosis unit monitors the operating parameters of each module in real time. When nozzle blockage occurs (water pressure rises by more than 10%), water pump failure occurs (water pressure drops by more than 20%), or sensor abnormality occurs (data fluctuation exceeds 5%), it automatically issues an alarm signal and starts the backup equipment.

[0031] The historical data storage unit stores parameter data (temperature, pressure, speed, stress, etc.) from each cooling process, along with the final performance test data of the steel plate, in the database for subsequent optimization and traceability of cooling strategies.

[0032] Preferably, the auxiliary adjustment module includes:

[0033] The edge shielding unit has adjustable shielding baffles on both sides of the cooling main module. The height of the baffles can be adjusted according to the width of the steel plate (suitable for steel plates with a width of 1 to 4m) to shield the edge of the steel plate from excess cooling water and reduce stress concentration caused by excessively rapid cooling at the edge.

[0034] The side spray compensation unit has side spray nozzles installed inside the shielding baffle. When the temperature difference between the edge and the middle of the steel plate exceeds 20°C, the side spray nozzles are activated to spray cooling water onto the edge to compensate for the cooling intensity of the edge and keep the transverse temperature uniformity error of the steel plate within 5%.

[0035] The warpage correction unit is equipped with a straightening roller group at the outlet of the cooling zone. Based on the warpage data of the steel plate collected by the displacement sensor, the pressure of the straightening roller (adjustment range 5-20kN) and the roller gap are adjusted to correct the slightly warped steel plate in real time, ensuring that the flatness of the steel plate is ≤2mm / m.

[0036] Preferably, the auxiliary adjustment module further includes:

[0037] The performance prediction unit, based on the cooling process parameters collected by the detection and control module and historical database data, uses a neural network algorithm to establish a predictive model for the tear resistance performance of the steel plate, and predicts the tensile strength and elongation of the steel plate after cooling in advance.

[0038] If the performance indicators predicted by the performance prediction unit do not meet the preset requirements, the parameter optimization unit automatically adjusts the cooling intensity of the main cooling module, the water temperature and pressure of the water supply treatment module, and the side shielding and side spray compensation parameters of the auxiliary adjustment module until the predicted performance indicators meet the requirements, and then performs the final cooling operation.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. By employing zoned gradient cooling technology and precisely controlling the cooling rate, the system effectively reduces thermal stress in the steel plate, preventing tearing caused by uneven temperature. In particular, the dense nozzle arrangement and cooling intensity adjustment in the high-temperature rapid cooling zone stabilize the temperature gradient on the steel plate surface, significantly improving its tensile strength and elongation, and enhancing its tear resistance.

[0041] 2. The water supply treatment module employs multiple measures, including three-stage filtration, pressure regulation, temperature control, and water recycling, to ensure the stability and cleanliness of the cooling water, preventing cooling effects from being affected by poor water quality or excessively low or high water temperatures. Simultaneously, water recycling reduces resource waste and effectively lowers production costs.

[0042] 3. Through the integrated detection and control module, the system can collect multi-dimensional data in real time and make dynamic adjustments. The fault diagnosis and historical data storage functions not only improve the reliability of the system, but also provide data support for subsequent optimization of cooling strategies. This intelligent control mechanism ensures the accuracy of the cooling process and the stability of the steel plate quality. Attached Figure Description

[0043] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0044] Figure 1 This is a system framework diagram of the present invention. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] Please see Figure 1 As shown, a post-rolling cooling system for tear-resistant thick steel plates includes: a cooling main module, a water supply and treatment module, a detection and control module, and an auxiliary adjustment module.

[0048] The cooling main module is used to perform regional gradient cooling of high-temperature thick steel plates after rolling. It forms a precise water curtain through multiple sets of nozzle assemblies to control the cooling rate of the steel plate in order to improve its tear resistance.

[0049] The water supply treatment module is used to provide a stable and clean cooling water source for the main cooling module. Through water filtration and pressure regulation, it ensures the continuity of the cooling process and the cooling effect.

[0050] The detection and control module is electrically connected to the cooling main module and the water supply treatment module. The detection and control module is used to collect the steel plate temperature and cooling water flow rate parameters in real time and automatically adjust the cooling strategy based on the preset cooling curve.

[0051] The auxiliary adjustment module is electrically connected to the cooling main module and the detection and control module. The auxiliary adjustment module is used to perform edge shielding and side spray compensation according to the temperature difference between the edge and the middle of the steel plate, so as to avoid the risk of steel plate tearing caused by uneven cooling.

[0052] The cooling main module includes:

[0053] Based on the temperature distribution characteristics of rolled thick steel plates, the cooling zone is divided into a high-temperature rapid cooling zone, a medium-temperature transitional cooling zone, and a low-temperature precision cooling zone, with each zone independently controlling the cooling intensity.

[0054] The nozzle arrangement unit uses high-density fan-shaped nozzles in the high-temperature rapid cooling zone, medium-density conical nozzles in the medium-temperature transition cooling zone, and low-density direct-fire nozzles in the low-temperature precision cooling zone. The nozzle spacing in each zone can be adjusted according to the thickness of the steel plate.

[0055] The water curtain control unit adjusts the inlet water pressure of the nozzles in each area through a variable frequency water pump, and controls the opening and closing sequence of the nozzles with a solenoid valve to form a continuous and uniform cooling water curtain, ensuring that the temperature gradient on the steel plate surface is stable at 5-10℃ / s.

[0056] Breaking away from the traditional fixed design pattern of single-area and homogeneous nozzles in cooling systems, this innovative solution adopts a combination of zoned and differentiated nozzles. Based on the cooling requirements of different temperature ranges of the steel plate, it matches three different spray characteristics: fan-shaped, cone-shaped, and direct-shot nozzles. At the same time, it achieves dynamic adjustment of nozzle spacing with the thickness of the steel plate, solving the problems of poor adaptability of traditional nozzles and inability to accurately match the cooling intensity to the temperature range. In addition, by using a variable frequency water pump and a solenoid valve to control the water curtain, it has for the first time controlled the temperature gradient fluctuation of the steel plate surface within a narrow range of 5-10℃ / s, breaking through the technical bottleneck of large temperature gradient fluctuation in traditional systems.

[0057] The cooling main module also includes:

[0058] The temperature feedback unit is equipped with an infrared high-temperature detector at the outlet of each cooling zone to collect the surface temperature data of the steel plate in real time and transmit the data to the detection and control module.

[0059] The cooling intensity adjustment unit, based on the temperature data collected by the temperature feedback unit, dynamically adjusts the cooling intensity of each area by adjusting the nozzle inlet water pressure (adjustment range 0.3-1.2MPa) and the roller conveyor speed (adjustment range 0.5~2m / s), so that the temperature difference between the core and surface of the steel plate is controlled within 30℃.

[0060] An innovative closed-loop control logic for real-time temperature measurement and dynamic parameter adjustment at the regional outlets was constructed. Infrared high-temperature detectors were installed separately at the outlets of each cooling zone. Compared with the traditional system that only measures the temperature at the cooling end, this system enables segmented monitoring and adjustment of the cooling process, avoiding the accumulation of cooling deviations caused by the delayed temperature measurement in the traditional system. At the same time, for the first time, the nozzle water inlet pressure and roller conveyor speed were combined as cooling intensity adjustment parameters, and the precise adjustment range of pressure and speed was clearly defined. Through dual-parameter collaborative control, the temperature difference between the core and surface of the steel plate was reduced from more than 50°C in the traditional system to less than 30°C, which significantly reduced the risk of tearing caused by thermal stress.

[0061] The water supply treatment module includes:

[0062] The water storage unit is equipped with a large-capacity water tank. A liquid level sensor is installed inside the water tank to monitor the water level in real time. When the water level is lower than the preset value (lower than 1 / 3 of the total volume of the water tank), the water replenishment device is automatically activated.

[0063] The water filtration unit adopts a three-stage filtration structure. The first stage is a coarse filter (50μm pore size) to filter large particulate impurities. The second stage is a precision filter (5μm pore size) to filter fine impurities. The third stage is an activated carbon filter to adsorb organic matter in the water, ensuring that the impurity content in the cooling water is less than 5mg / L.

[0064] The pressure stabilization unit is a constant pressure variable frequency pump installed on the water supply pipeline. Combined with a pressure sensor, it monitors the water pressure in the pipeline in real time and stabilizes the water pressure within a preset range (0.4-1.0MPa) to avoid water pressure fluctuations affecting the stability of the cooling water curtain.

[0065] Addressing the three major pain points of traditional water supply systems—poor water quality, large water pressure fluctuations, and delayed water replenishment—this innovative integrated water supply solution combines three-stage filtration, constant pressure control, and automatic water replenishment. The three-stage filtration structure, for the first time, controls the impurity content in the cooling water to below 5 mg / L, solving the nozzle clogging problem caused by the inability of traditional single-stage filtration to remove fine impurities and organic matter. Simultaneously, the combination of a constant pressure variable frequency pump and a pressure sensor stabilizes the water pressure at 0.4-1.0 MPa, overcoming the limitation of traditional water supply systems with water pressure fluctuations exceeding 20%. Furthermore, automatic water replenishment triggered by a liquid level sensor avoids the risk of water outages caused by traditional manual water replenishment, ensuring continuous water supply.

[0066] The water supply treatment module also includes:

[0067] The water temperature regulation unit is equipped with heating tubes and cooling coils in the water storage tank. It collects water temperature data through temperature sensors. When the water temperature is below 15℃, the heating tubes are activated, and when it is above 30℃, the cooling coils are activated to control the water temperature between 18-25℃, so as to avoid condensation on the steel plate surface due to excessively low water temperature and reduced cooling efficiency due to excessively high water temperature.

[0068] The water recycling unit has a water collection tank installed below the cooling area. The water collection tank is equipped with a filter screen and a sedimentation tank to perform preliminary filtration and sedimentation on the used cooling water. The treated cooling water is then transported to a storage tank for secondary use.

[0069] For the first time, an active water temperature regulation mechanism has been added to the water supply system. Through the synergistic effect of heating pipes and cooling coils, the water temperature is precisely controlled between 18-25℃, filling the technological gap of traditional systems that rely on ambient water temperature and whose cooling efficiency fluctuates with the seasons. At the same time, an innovative design of a simple water circulation structure consisting of a water collection tank, a filter screen, and a sedimentation tank has been implemented, which can achieve the secondary use of cooling water without the need for complex water treatment equipment. Compared with the traditional system where the water circulation utilization rate is less than 50%, the utilization rate is increased to more than 80%, which achieves energy conservation while ensuring water quality, and takes into account both technical practicality and environmental protection.

[0070] The detection control module includes:

[0071] In addition to collecting data on steel plate temperature and cooling water flow rate, the parameter acquisition unit also collects internal stress data of the steel plate during the cooling process through a stress sensor and warpage data of the steel plate through a displacement sensor.

[0072] The data processing unit uses a PLC controller to analyze and process the collected multi-dimensional data, and establishes a correlation model between steel plate temperature, stress, warpage and cooling parameters (pressure, speed, water temperature).

[0073] The strategy generation unit generates the optimal cooling control strategy based on the correlation model and the preset tear resistance performance index (requiring the steel plate tensile strength ≥600MPa and elongation ≥18%), and sends the control command to the cooling main module and the water supply treatment module.

[0074] Breaking through the limitations of traditional testing systems that only measure temperature and ignore stress and warpage, this system is the first to include internal stress and warpage of steel plates in the testing scope. It achieves simultaneous acquisition of multi-dimensional parameters such as temperature, stress, and warpage, providing more comprehensive data support for cooling strategy optimization. At the same time, it innovatively establishes a multi-parameter correlation model through a PLC controller, directly linking cooling parameters with steel plate performance indicators. Compared with the traditional system that relies on experience to set cooling parameters, this system enables performance indicators to drive the generation of cooling strategies, ensuring that the final steel plate performance consistently meets the standards.

[0075] The detection control module also includes:

[0076] The fault diagnosis unit monitors the operating parameters of each module in real time. When nozzle blockage occurs (water pressure rises by more than 10%), water pump failure occurs (water pressure drops by more than 20%), or sensor abnormality occurs (data fluctuation exceeds 5%), it automatically issues an alarm signal and starts the backup equipment.

[0077] The historical data storage unit stores parameter data (temperature, pressure, speed, stress, etc.) from each cooling process, along with the final performance test data of the steel plate, in the database for subsequent optimization and traceability of cooling strategies.

[0078] The auxiliary adjustment module includes:

[0079] The edge shielding unit has adjustable shielding baffles on both sides of the cooling main module. The height of the baffles can be adjusted according to the width of the steel plate (suitable for steel plates with a width of 1 to 4m) to shield the edge of the steel plate from excess cooling water and reduce stress concentration caused by excessively rapid cooling at the edge.

[0080] The side spray compensation unit has side spray nozzles installed inside the shielding baffle. When the temperature difference between the edge and the middle of the steel plate exceeds 20°C, the side spray nozzles are activated to spray cooling water onto the edge to compensate for the cooling intensity of the edge and keep the transverse temperature uniformity error of the steel plate within 5%.

[0081] The warpage correction unit is equipped with a straightening roller group at the outlet of the cooling zone. Based on the warpage data of the steel plate collected by the displacement sensor, the pressure of the straightening roller (adjustment range 5-20kN) and the roller gap are adjusted to correct the slightly warped steel plate in real time, ensuring that the flatness of the steel plate is ≤2mm / m.

[0082] The auxiliary adjustment module also includes:

[0083] The performance prediction unit, based on the cooling process parameters collected by the detection and control module and historical database data, uses a neural network algorithm to establish a predictive model for the tear resistance performance of the steel plate, and predicts the tensile strength and elongation of the steel plate after cooling in advance.

[0084] If the performance indicators predicted by the performance prediction unit do not meet the preset requirements, the parameter optimization unit automatically adjusts the cooling intensity of the main cooling module, the water temperature and pressure of the water supply treatment module, and the side shielding and side spray compensation parameters of the auxiliary adjustment module until the predicted performance indicators meet the requirements, and then performs the final cooling operation.

[0085] In summary, the advantages of this invention are:

[0086] The main cooling module adopts a zoned gradient cooling design, dividing the cooling process into a high-temperature rapid cooling zone, a medium-temperature transitional cooling zone, and a low-temperature precision cooling zone. Each zone uses an independent nozzle arrangement and a water curtain control unit to stabilize the surface temperature gradient of the steel plate at 5-10℃ / s, and control the temperature difference between the core and the surface within 30℃. At the same time, the edge shielding unit and side spray compensation unit of the auxiliary adjustment module can dynamically adjust the shielding height according to the width of the steel plate. When the temperature difference between the edge and the center exceeds 20℃, the side spray compensation is automatically activated, which reduces the error of transverse temperature uniformity and fundamentally solves the tearing problem caused by stress concentration, thereby improving the tear resistance qualification rate of the steel plate.

[0087] The three-stage filtration structure of the water supply treatment module can control the impurity content in the cooling water to below 5mg / L, effectively preventing nozzle clogging. The water temperature regulation unit stabilizes the water temperature at 18-25℃ through heating tubes and cooling coils, ensuring constant cooling efficiency. The combination of constant pressure variable frequency pump and pressure sensor can stabilize the water supply pressure at 0.4-1.0MPa, avoiding water curtain fluctuations. The above design increases the continuous operation time of the cooling system to more than 800 hours and reduces the fluctuation of cooling effect.

[0088] The multi-dimensional parameter acquisition unit and PLC data processing unit of the detection and control module can establish a correlation model between cooling parameters and steel plate performance, and automatically generate the optimal cooling scheme in combination with the strategy generation unit; the fault diagnosis unit can monitor the operating parameters in real time, and automatically alarm and start the backup equipment when problems such as nozzle blockage or water pump failure occur, shortening the fault handling time; the historical data storage unit can trace the parameters and performance data of each cooling process, providing support for strategy optimization, so that the tensile strength and elongation fluctuation range of the same batch of steel plates are controlled within ±5%, which fully meets the performance requirements of high-end equipment;

[0089] The water recycling unit of the water supply treatment module improves the utilization rate of cooling water through the combination of water collection tank, filter screen and sedimentation tank. At the same time, the performance prediction unit and parameter optimization unit can predict the performance of steel plates in advance, avoid the scrapping of work-in-process due to improper cooling parameters, reduce the scrap rate, and reduce economic losses per production line per year. In addition, the system's automated control design can reduce the amount of manual operation and further reduce production management costs.

[0090] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A system for post-rolling cooling of a thick steel plate resistant to tearing, characterized in that, include: The cooling main module, water supply treatment module, detection and control module, and auxiliary adjustment module are included. The cooling main module is used to perform regional gradient cooling of high-temperature thick steel plates after rolling, and forms a precise water curtain through multiple sets of nozzle assemblies. The water supply treatment module is used to provide cooling water to the main cooling module through water filtration and pressure regulation. The detection and control module is electrically connected to the cooling main module and the water supply treatment module. The detection and control module is used to collect the steel plate temperature and cooling water flow rate parameters in real time and automatically adjust the cooling strategy based on the preset cooling curve. The auxiliary adjustment module is electrically connected to the cooling main module and the detection and control module. The auxiliary adjustment module is used to perform edge shielding and side spray compensation based on the temperature difference between the edge and the middle of the steel plate.

2. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 1, characterized in that, The cooling main module includes: Based on the temperature distribution characteristics of rolled thick steel plates, the cooling zone is divided into a high-temperature rapid cooling zone, a medium-temperature transitional cooling zone, and a low-temperature precision cooling zone, with each zone independently controlling the cooling intensity. The nozzle arrangement unit uses high-density fan-shaped nozzles in the high-temperature rapid cooling zone, medium-density conical nozzles in the medium-temperature transition cooling zone, and low-density direct-fire nozzles in the low-temperature precision cooling zone. The nozzle spacing in each zone can be adjusted according to the thickness of the steel plate. The water curtain control unit adjusts the inlet water pressure of the nozzles in each area through a variable frequency water pump, and controls the opening and closing sequence of the nozzles with a solenoid valve to form a continuous and uniform cooling water curtain.

3. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 2, characterized in that, The cooling main module also includes: The temperature feedback unit is equipped with an infrared high-temperature detector at the outlet of each cooling zone to collect the surface temperature data of the steel plate in real time and transmit the data to the detection and control module. The cooling intensity adjustment unit dynamically adjusts the cooling intensity of each area based on the temperature data collected by the temperature feedback unit by adjusting the nozzle water inlet pressure and the roller conveyor speed.

4. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 3, characterized in that, The water supply treatment module includes: The water storage unit is equipped with a large-capacity water tank. A liquid level sensor is installed inside the water tank to monitor the water level in real time. When the water level is lower than the preset value, the water replenishment device is automatically activated. The water filtration unit adopts a three-stage filtration structure. The first stage is a coarse filter to filter large particles of impurities, the second stage is a precision filter to filter fine impurities, and the third stage is an activated carbon filter to adsorb organic matter in the water. The pressure stabilization unit installs a constant pressure variable frequency pump on the water supply pipeline, and combines it with a pressure sensor to monitor the water pressure in the pipeline in real time, stabilizing the water pressure within a preset range and avoiding water pressure fluctuations from affecting the stability of the cooling water curtain.

5. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 4, characterized in that, The water supply treatment module also includes: The water temperature regulation unit is equipped with heating tubes and cooling coils in the water storage tank. It collects water temperature data through temperature sensors. When the water temperature is below 15℃, the heating tubes are activated, and when it is above 30℃, the cooling coils are activated to control the water temperature between 18-25℃, so as to avoid condensation on the steel plate surface due to excessively low water temperature and reduced cooling efficiency due to excessively high water temperature. The water recycling unit has a water collection tank installed below the cooling area. The water collection tank is equipped with a filter screen and a sedimentation tank to perform preliminary filtration and sedimentation of the used cooling water. The treated cooling water is then transported to a storage tank for secondary use.

6. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 5, characterized in that, The detection control module includes: In addition to collecting data on steel plate temperature and cooling water flow rate, the parameter acquisition unit also collects internal stress data of the steel plate during the cooling process through a stress sensor and warpage data of the steel plate through a displacement sensor. The data processing unit uses a PLC controller to analyze and process the collected multi-dimensional data, and establishes a correlation model between steel plate temperature, stress, warpage and cooling parameters. The strategy generation unit generates the optimal cooling control strategy based on the correlation model and preset tear resistance performance indicators, and sends the control commands to the cooling main module and the water supply treatment module.

7. The post-rolling cooling system for tear-resistant thick steel plates according to claim 6, characterized in that, The detection control module also includes: The fault diagnosis unit monitors the operating parameters of each module in real time. When nozzle blockage, water pump failure, or sensor abnormality occurs, it automatically issues an alarm signal and activates backup equipment. The historical data storage unit stores parameter data from each cooling process and the final performance test data of the steel plate in the database for subsequent optimization and traceability of cooling strategies.

8. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 7, characterized in that, The auxiliary adjustment module includes: The edge shielding unit has adjustable shielding baffles on both sides of the cooling main module. The height of the baffles can be adjusted according to the width of the steel plate to shield the excess cooling water at the edge of the steel plate. The side spray compensation unit is equipped with side spray nozzles inside the shielding baffle. When the temperature difference between the edge and the middle of the steel plate exceeds 20°C, the side spray nozzles are activated to spray cooling water onto the edge to compensate for the cooling intensity of the edge. The warpage correction unit is equipped with a straightening roller group at the outlet of the cooling zone. Based on the warpage data of the steel plate collected by the displacement sensor, the pressure of the straightening roller and the roller gap are adjusted to correct the slightly warped steel plate in real time.

9. A post rolling cooling system for a thick steel plate resistant to tearing according to claim 8, characterized in that, The auxiliary adjustment module also includes: The performance prediction unit, based on the cooling process parameters collected by the detection and control module and historical database data, uses a neural network algorithm to establish a predictive model for the tear resistance performance of the steel plate, and predicts the tensile strength and elongation of the steel plate after cooling in advance. If the performance indicators predicted by the performance prediction unit do not meet the preset requirements, the parameter optimization unit automatically adjusts the cooling intensity of the main cooling module, the water temperature and pressure of the water supply treatment module, and the side shielding and side spray compensation parameters of the auxiliary adjustment module until the predicted performance indicators meet the requirements, and then performs the final cooling operation.

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