Control system and process for adjusting parameters according to cooling water temperature

Abstract

The invention discloses a control system and process for adjusting parameters according to cooling water temperature, and belongs to the technical field of steel plate production. The control system for adjusting the parameters according to the cooling water temperature comprises a switch, a host, a cooling tower unit, a rolling mill unit and a temperature detection unit. According to the process of the control system for adjusting the parameters according to the cooling water temperature, three stages are preset, each stage is determined according to the water temperature of the cooling water, and when the cooling water reaches the temperature preset in the corresponding final cooling low-temperature process, the final cooling medium-temperature process and the final cooling high-temperature process, a host can control the cooling bed temperature during final cooling; the method is used for ensuring that different cooling processes are adopted when different water temperatures are dealt with, and the problem that the performance of a steel plate is insufficient or exceeds the upper limit due to the fact that only the cooling temperature range is given by a traditional process and the same cooling process is adopted when seasonal changes and cooling water temperature changes occur is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel plate production, and in particular to a control system for adjusting parameters according to cooling water temperature and a process thereof. Background Art

[0002] Hot rolling is relative to cold rolling. Cold rolling is rolling below the recrystallization temperature, while hot rolling is rolling above the crystallization temperature. Simply put, a piece of steel billet is heated and rolled several times, then trimmed and corrected into a steel plate. This is called hot rolling. It can significantly reduce energy consumption and reduce costs. During hot rolling, the metal has high plasticity and low deformation resistance, which greatly reduces the energy consumption of metal deformation.

[0003] Post-rolling cooling is an important step in the production process of hot-rolled steel plates. It involves cooling the high-temperature steel plates after rolling to a suitable temperature to obtain the desired microstructure and corresponding mechanical properties. The method and speed of post-rolling cooling have a significant impact on the final performance of the steel plate. According to the different cooling intensity, post-rolling cooling can be divided into natural cooling, forced cooling and slow cooling. Forced cooling, also known as accelerated cooling, is a cooling method faster than natural cooling. It can refine the grains of the steel plate, reduce or even eliminate the reticular structure, use high temperature and grain structure to replace the heat treatment process, and improve material properties.

[0004] The current traditional cooling process parameters only give the cooling temperature range. When seasonal changes and changes in cooling water temperature occur, the original cooling process cannot switch processes according to seasonality. For example, when the water temperature becomes low in winter, using the same cooling process as usual can easily lead to a lower temperature when the steel plate is cooled, causing the steel plate to cool faster, which will cause the performance to exceed the upper limit. Conversely, in summer or when the cooling water temperature is high due to long-term circulation of cooling water, the cooling effect of the cooling water is low during cooling of the steel plate, causing the steel plate to fail to meet performance requirements, thereby resulting in a low qualified rate of finished products. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a control system and process for adjusting parameters according to the cooling water temperature, so as to achieve the technical effect of replacing the corresponding process according to the different temperatures of the cooling water and reducing the impact of seasons.

[0006] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions: The technical solution of the present invention is: a control system that adjusts parameters according to cooling water temperature, comprising a switch, a main engine, a cooling tower unit and a rolling mill unit, wherein the rolling mill unit comprises a finishing unit, a hot rolling unit, a roller unit, a final rolling unit and a final cooling unit; the cooling tower unit, the finishing unit, the hot rolling unit, the roller unit and the final rolling unit are each provided with a corresponding temperature detector, and each of the temperature detectors is connected to the main engine through a signal between the switch.

[0007] Furthermore, the final cooling unit includes a controller capable of controlling the temperature of the cooling bed, a final cooling transceiver module capable of sending and receiving signals, and a temperature detection module capable of detecting the temperature of the cooling bed.

[0008] Furthermore, the host includes a host control module, a host signal receiving and sending module and a host display module.

[0009] Furthermore, the switch is connected to the host and the rolling mill workshop through wires, and the rolling mill workshop is provided with a controller for controlling the corresponding equipment, and the controller is connected to the host through the switch.

[0010] A process for controlling a control system for adjusting parameters according to cooling water temperature, comprising the following steps: S0, data preset, according to the temperature of cooling water, set three modes, namely final cooling low temperature process, final cooling medium temperature process and final cooling high temperature process, and preset the data of finished thickness of steel plate, waiting temperature thickness, finishing rolling pass, second rolling temperature, final rolling temperature, final cooling temperature and ACC roll speed; S1. Equipment connection: Use a switch to connect the host computer with the rolling mill workshop so that the system can control the equipment in the rolling mill workshop through the switch; S2, start cooling, the rolled steel plate is cooled by cooling water to make the steel plate reach the set temperature; S3, preliminary temperature detection. During the cooling process, the cooling water temperature slowly rises due to the continuous use of cooling water. At this time, a temperature sensor can be used to detect the cooling water temperature and obtain a preliminary detection temperature T1, which is convenient for the operator to observe the cooling water temperature; S4. Turn on the cooling tower. When the cooling water gradually rises, the operator turns on the cooling tower to cool down the water, and try to ensure that the cooling water temperature fluctuation does not exceed 5°C; S5, secondary temperature detection. After the cooling tower is turned on, the temperature sensor detects the temperature of the cooling water in real time to obtain the secondary detection temperature T2, which is convenient for the subsequent host to select the cooling process according to the temperature; S6, select a process, use the secondary detection temperature T2 and the preliminary detection temperature T1 to calculate the current cooling water temperature rise value ΔT, and use this to select the subsequent final cooling process; specifically, when the cooling water temperature rise value ΔT is within the range of 0-5°C, the existing water temperature process is adopted, and when the cooling water temperature rise value ΔT exceeds the range of 0-5°C, the host sends an instruction through the control module to adopt the preset final cooling low temperature process, final cooling medium temperature process and final cooling high temperature process; S7, cooling is completed, according to the selected process until the steel plate is cooled; S8. Inspection and acceptance: The cooled steel plates are inspected in batches and qualified steel plates are accepted.

[0011] Furthermore, in step S0, the triggering condition for the final cooling low-temperature process is that the temperature of the cooling water is less than 23°C, then the triggering condition for the final cooling medium-temperature process is that the temperature of the cooling water is 23-28°C, and the triggering condition for the final cooling high-temperature process is that the temperature of the cooling water is greater than 28°C.

[0012] Further, in step S0, the finished thickness of the steel plate is 16.8 mm, the waiting thickness is 70-80 mm, the finishing passes are seven times, the second rolling temperature is ≤950°C, the final rolling temperature is 880±10°C and the ACC roll speed is 1.8-2 m / s.

[0013] Furthermore, in step S6, when the temperature of the cooling water is less than 23°C, a final cooling low temperature process is adopted, and at this time, the host adjusts the final cooling temperature of the steel plate through the controller so that its temperature range is 480±20°C.

[0014] Furthermore, in step S6, when the temperature of the cooling water is 23-28°C, a medium-temperature final cooling process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through a controller so that its temperature range is 470±20°C.

[0015] Furthermore, in step S6, when the temperature of the cooling water is greater than 28°C, a high-temperature final cooling process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through a controller so that its temperature range is 450±20°C.

[0016] The beneficial technical effect of the present invention is that the process is preset with three stages according to the temperature of cooling water, and the three stages are respectively defined as a final cooling low-temperature process, a final cooling medium-temperature process and a final cooling high-temperature process according to the temperature. Each stage is determined according to the temperature of the cooling water. When the cooling water reaches the preset temperature corresponding to the final cooling low-temperature process, the final cooling medium-temperature process and the final cooling high-temperature process, the main engine can control the cooling temperature during the final cooling to ensure that different cooling processes are used when dealing with different water temperatures, thereby avoiding the problem that the traditional process only gives a cooling temperature range. When seasonal changes and changes in cooling water temperature occur, the same cooling process is used, which will result in insufficient or excessive performance of the steel plate, resulting in a low performance qualification rate and cost waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a module schematic diagram of a control system for adjusting parameters according to cooling water temperature of the present invention; Figure 2 yes Figure 1 Schematic diagram of the module of the host unit; Figure 3 yes Figure 1 Schematic diagram of the module of the intermediate final cooling unit; Figure 4 It is a schematic flow chart of a process of a control system for adjusting parameters according to cooling water temperature of the present invention; Figure 5 yes Figure 4 Schematic diagram of the process selection process. DETAILED DESCRIPTION

[0018] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0019] See attached Figure 1 As shown, a control system for adjusting parameters according to cooling water temperature comprises a switch, a host, a cooling tower unit and a rolling mill unit, wherein the host comprises a host control module, a host signal receiving and sending module and a host display module, and the rolling mill unit comprises a finishing unit, a hot rolling unit, a roller unit, a final rolling unit and a final cooling unit; the final cooling unit comprises a controller capable of controlling the temperature of a cooling bed, a final cooling receiving and sending module capable of sending and receiving signals, and a temperature detection module capable of detecting the temperature of the cooling bed, and corresponding temperature detectors are arranged in the cooling tower unit, the finishing unit, the hot rolling unit, the roller unit and the final rolling unit, and each of the temperature detectors is connected to the host through a signal between the switch.

[0020] See attached Figure 2-3As shown, the switch is connected to the host and the rolling mill workshop by signals through wires, and the rolling mill workshop is provided with a controller for controlling the corresponding equipment, and the controller is connected to the host by signals between the switch, and the host signal receiving module in the host is connected to the temperature detectors in the cooling tower unit, the finishing unit, the hot rolling unit, the roller unit and the final rolling unit by signals, and the temperature detected by the temperature detector can be displayed through the host display module for real-time viewing by the staff, and the host is also connected to the final cooling unit by signals through the switch, so that the temperature detection module in the final cooling unit is connected to the host by signals. During the final cooling process, the host can observe the temperature in the final cooling unit in real time. When the host control module detects the temperature of the corresponding cooling tower After the cooling water temperature reaches the preset value, the host control module sends a control signal through the host signal receiving and sending module, and then the final cooling receiving and sending module in the final cooling unit receives the signal and transmits the control signal to the controller, and then the controller starts to control the cooling bed to adjust the temperature, so as to adjust the corresponding cooling process according to the temperature of the cooling water, avoiding the problem of performance exceeding the upper limit when the same cooling process is used under different temperatures, replacing the traditional cooling method, and avoiding the problem that the traditional cooling method only gives the cooling temperature range, when the seasons change and the cooling water temperature changes, for example, when the cooling water temperature becomes low during the cooling process, using the same cooling process will cause the performance to exceed the upper limit, and the cooling water temperature becomes high, then the performance requirements cannot be met.

[0021] See attached Figure 4-5 As shown, a process for controlling a control system for adjusting parameters according to cooling water temperature comprises the following steps: S0, data preset, according to the temperature of cooling water, according to the temperature of cooling water, set three modes, the three modes are final cooling low temperature process, final cooling medium temperature process and final cooling high temperature process, wherein the trigger condition of final cooling low temperature process is that the water temperature of cooling water is less than 23 ℃, then it is adopted, the trigger condition of final cooling medium temperature process is that the water temperature of cooling water is 23-28 ℃, the trigger condition of final cooling high temperature process is that the water temperature of cooling water is greater than 28 ℃, and the data of finished thickness, waiting thickness, finishing rolling pass, second rolling temperature, final rolling temperature, final cooling temperature and ACC roller speed of steel plate are preset, wherein the finished thickness of steel plate is 16.8mm, the waiting thickness is 70-80mm, the finishing rolling pass is seven times, the second rolling temperature is ≤950℃, the final rolling temperature is 880±10℃ and the ACC roller speed is 1.8-2m / s; S1, equipment connection, use the switch to connect the host and the rolling mill workshop by signal, so that the system can control the equipment in the rolling mill workshop through the switch. In this step, the switch is connected to the host and the rolling mill workshop by wires, and the rolling mill workshop is equipped with a controller to control the corresponding equipment, and the controller is connected to the host by signal between the switch and the host. S2, start cooling, the rolled steel plate is cooled by cooling water to make the steel plate reach the set temperature; S3, preliminary temperature detection. During the cooling process, the cooling water temperature slowly rises due to the continuous use of cooling water. At this time, the temperature sensor can be used to detect the cooling water temperature and obtain the preliminary detection temperature T1, which is convenient for the operator to observe the cooling water temperature. The temperature of T1 is ≥10℃; S4. Turn on the cooling tower. When the cooling water gradually rises, the operator turns on the cooling tower to cool down the water, and try to ensure that the cooling water temperature fluctuation does not exceed 5°C; S5, secondary temperature detection, after the cooling tower is turned on, the temperature sensor detects the water temperature of the cooling water in real time to obtain the secondary detection temperature T2, so that the subsequent host can select the cooling process according to the temperature. In this step; S6, select a process, use the secondary detection temperature T2 and the preliminary detection temperature T1 to calculate the current cooling water temperature rise value ΔT, and use this to select the subsequent final cooling process; specifically, when the cooling water temperature rise value ΔT is within the range of 0-5°C, the existing water temperature process is adopted, and when the cooling water temperature rise value ΔT exceeds the range of 0-5°C, the host sends an instruction through the control module to adopt the preset final cooling low temperature process, final cooling medium temperature process and final cooling high temperature process. The final cooling temperature adjustment parameters of the existing water temperature process and the final cooling low temperature process are the same, and the cooling water temperature rise value ΔT is within the range of 0-5°C. When the value ΔT exceeds the range of 0-5℃, when the temperature of cooling water is less than 23℃, the final cooling low temperature process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through the controller to make its temperature range within 480±20℃. When the temperature of cooling water is 23-28℃, the final cooling medium temperature process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through the controller to make its temperature range within 470±20℃. When the temperature of cooling water is greater than 28℃, the final cooling high temperature process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through the controller to make its temperature range within 450±20℃. S7, cooling is completed, according to the selected process until the steel plate is cooled; S8. Inspection and acceptance: The cooled steel plates are inspected in batches and qualified steel plates are accepted.

[0022] The process is set up in three stages, which are respectively defined as a final cooling low-temperature process, a final cooling medium-temperature process and a final cooling high-temperature process according to the temperature. During the final cooling, the cooling temperature is determined by the temperature of the cooling water, thereby avoiding the problem of insufficient or exceeding the upper limit of steel plate performance due to seasonal changes and changes in cooling water temperature, thereby resulting in low performance qualification rate and high cost.

[0023] Compared with the traditional cooling process, the cooling parameter control method based on water temperature has reduced the number of defective products to less than 100 tons after the current process control method was used. The qualified rate was increased while reducing production costs.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A control system for adjusting parameters according to cooling water temperature, characterized in that: It includes a switch, a main machine, a cooling tower unit and a rolling mill unit, wherein the rolling mill unit includes a finishing rolling unit, a hot rolling unit, a roller table unit, a final rolling unit and a final cooling unit; The cooling tower unit, the finishing unit, the hot rolling unit, the roller table unit and the final rolling unit are all provided with corresponding temperature detectors, and each of the temperature detectors is connected to the host computer through a signal between a switch.

2. The control system for adjusting parameters according to cooling water temperature according to claim 1, characterized in that: The final cooling unit includes a controller capable of controlling the temperature of the cooling bed, a final cooling transceiver module capable of sending and receiving signals, and a temperature detection module capable of detecting the temperature of the cooling bed.

3. The control system for adjusting parameters according to cooling water temperature according to claim 1, characterized in that: The host comprises a host control module, a host signal receiving and sending module and a host display module.

4. The control system for adjusting parameters according to cooling water temperature according to claim 1, characterized in that: The switch is connected to the host machine and the rolling mill workshop through wires respectively, and the rolling mill workshop is provided with a controller for controlling corresponding equipment, and the controller is connected to the host machine through the switch.

5. A process for controlling a system for adjusting parameters according to cooling water temperature as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S0, data preset, according to the temperature of cooling water, set three modes, namely final cooling low temperature process, final cooling medium temperature process and final cooling high temperature process, and preset the data of finished thickness of steel plate, waiting temperature thickness, finishing rolling pass, second rolling temperature, final rolling temperature, final cooling temperature and ACC roll speed; S1. Equipment connection: Use a switch to connect the host computer with the rolling mill workshop so that the system can control the equipment in the rolling mill workshop through the switch; S2, start cooling, the rolled steel plate is cooled by cooling water to make the steel plate reach the set temperature; S3, preliminary temperature detection. During the cooling process, the cooling water temperature slowly rises due to the continuous use of cooling water. At this time, a temperature sensor can be used to detect the cooling water temperature and obtain a preliminary detection temperature T1, which is convenient for the operator to observe the cooling water temperature; S4. Turn on the cooling tower. When the cooling water gradually rises, the operator turns on the cooling tower to cool down the water, and try to ensure that the cooling water temperature fluctuation does not exceed 5°C; S5, secondary temperature detection. After the cooling tower is turned on, the temperature sensor detects the temperature of the cooling water in real time to obtain the secondary detection temperature T2, which is convenient for the subsequent host to select the cooling process according to the temperature; S6, select a process, use the secondary detection temperature T2 and the preliminary detection temperature T1 to calculate the current cooling water temperature rise value ΔT, and use this to select the subsequent final cooling process; specifically, when the cooling water temperature rise value ΔT is within the range of 0-5°C, the existing water temperature process is adopted, and when the cooling water temperature rise value ΔT exceeds the range of 0-5°C, the host sends an instruction through the control module to adopt the preset final cooling low temperature process, final cooling medium temperature process and final cooling high temperature process; S7, cooling is completed, according to the selected process until the steel plate is cooled; S8. Inspection and acceptance: The cooled steel plates are inspected in batches and qualified steel plates are accepted.

6. The process of controlling the system according to the cooling water temperature adjustment parameter according to claim 5, characterized in that: In step S0, the trigger condition for the final cooling low-temperature process is that the cooling water temperature is less than 23°C, the trigger condition for the final cooling medium-temperature process is that the cooling water temperature is 23-28°C, and the trigger condition for the final cooling high-temperature process is that the cooling water temperature is greater than 28°C.

7. The process of controlling the system according to the cooling water temperature adjustment parameter according to claim 5, characterized in that: In step S0, the finished thickness of the steel plate is 16.8 mm, the waiting thickness is 70-80 mm, the finishing passes are seven times, the second rolling temperature is ≤950°C, the final rolling temperature is 880±10°C and the ACC roll speed is 1.8-2 m / s.

8. The process of controlling the system according to the cooling water temperature adjustment parameter according to claim 5, characterized in that: In step S6, when the temperature of the cooling water is less than 23°C, a final cooling low temperature process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through a controller so that its temperature range is 480±20°C.

9. The process of controlling the system according to the cooling water temperature adjustment parameter according to claim 5, characterized in that: In step S6, when the temperature of the cooling water is 23-28°C, the final cooling medium temperature process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through the controller so that its temperature range is 470±20°C.

10. The process of controlling the system according to the cooling water temperature adjustment parameter according to claim 5, characterized in that: In step S6, when the temperature of the cooling water is greater than 28°C, a high-temperature final cooling process is adopted. At this time, the host adjusts the final cooling temperature of the steel plate through a controller so that its temperature range is 450±20°C.

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