Temperature measuring system for working roll of hot rolling production line
By combining distance measuring and temperature measuring equipment and using the main control equipment to control temperature acquisition, the problem of time-consuming and inaccurate manual detection has been solved, enabling rapid and accurate measurement of hot rolling roll temperature and improving the control precision of hot continuous rolling.
Patent Information
- Application Number
- CN202423003444.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-05
AI Technical Summary
In the existing technology, the temperature detection of hot rolling work rolls relies on manual offline contact detection, which is time-consuming and affected by human experience. It cannot accurately reflect the true temperature state of the roll surface and cannot provide effective guidance for hot continuous rolling.
By combining distance measuring and temperature measuring devices, the main control device measures the real-time distance when the hot rolling rolls are loaded onto or unloaded. When the distance reaches the set value, the temperature measuring device is activated to collect the temperature. Combined with actual imaging taken by an industrial camera, the emissivity is adjusted to achieve non-contact, fast, and accurate temperature measurement.
It enables convenient, fast, and objectively accurate measurement of hot rolling roll temperature, provides effective temperature data guidance, and improves the precision control capability of hot continuous rolling.
Smart Images
Figure CN223588005U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hot rolling technology, and in particular to a temperature measurement system for work rolls in a hot rolling production line. Background Technology
[0002] In the hot-rolled strip steel production process, the thermal crown of the rolls is a crucial factor affecting the quality of the strip steel product. Controlling the roll temperature is fundamental to accurately controlling the thermal crown and predicting the roll's thermal deformation. To ensure the surface quality of the strip steel and improve the accuracy of the thermal expansion model, the roll temperature must be monitored in real time before and after the rolls leave and re-enter the mill. Implementing real-time monitoring of the roll temperature before and after re-entry is of great significance for accurately controlling the thermal crown and strip shape, and ultimately improving product quality.
[0003] Currently, the on-mill and off-mill temperatures of hot rolling mill work rolls are generally detected manually offline. This process is mainly done manually, and each roll test takes about 10 minutes. Not only is it time-consuming, but the detected temperatures are also greatly affected by human experience, failing to reflect the true temperature state of the roll surface and thus unable to provide guidance for hot continuous rolling. Utility Model Content
[0004] This invention provides a temperature measurement system for work rolls in a hot rolling production line to solve or partially solve the technical problem of low accuracy caused by manual offline contact detection.
[0005] To solve the above-mentioned technical problems, this utility model discloses a temperature measurement system for work rolls in a hot rolling production line, characterized in that the system includes:
[0006] Hot rolling rolls move in a specified direction when they are loaded onto or unloaded from the machine.
[0007] A distance measuring device is installed perpendicular to the specified direction of movement to measure the real-time distance between itself and the hot rolling roll when the hot rolling roll is being loaded onto or unloaded from the machine.
[0008] The temperature measuring device and the distance measuring device are arranged and installed in the same position;
[0009] The main control device is connected to the ranging device and the temperature measuring device respectively. The main control device receives the real-time distance through a data cable. When the real-time distance gradually decreases and becomes less than the set distance for roller detection, the main control device controls the temperature measuring device to continuously collect the temperature of the hot rolling roll surface according to the set emissivity.
[0010] Optionally, the system further includes: a data acquisition device, which is communicatively connected to the main control device; the data acquisition device captures actual images of the hot rolling roll when it is being loaded onto or unloaded from the machine;
[0011] The main control device modifies the set emissivity based on the actual imaging of the hot rolling roll.
[0012] Optionally, the acquisition device is an industrial camera.
[0013] Optionally, a production line level-one control system is communicatively connected to the main control equipment;
[0014] The production line primary control system monitors and records the actual position of the hot rolling roll in real time when it is being loaded onto or unloaded from the machine.
[0015] The main control device can start monitoring the real-time distance based on the actual location, or stop monitoring the real-time distance.
[0016] Optionally, the main control device may have a built-in or external timer that starts timing when the real-time distance is less than the set distance for roller detection.
[0017] When the real-time distance gradually decreases and the timer for the distance to be less than the set distance for roll detection exceeds a set time, the main control device controls the temperature measuring device to continuously collect the temperature of the hot rolling roll surface according to the set emissivity.
[0018] Optionally, the system further includes: a three-level control system for the production line, which is communicatively connected to the main control equipment and receives continuously collected temperature data of the surface of the hot rolling roll.
[0019] Optionally, the system further includes: a secondary control system for the production line, which is communicatively connected to the tertiary control system for the production line, and receives continuously collected temperature data of the surface of the hot rolling roll.
[0020] Optionally, the ranging device is a laser rangefinder.
[0021] Optionally, the temperature measuring device is an infrared thermometer.
[0022] Optionally, the main control device is a PLC.
[0023] Through one or more technical solutions of this utility model, this utility model has the following beneficial effects or advantages:
[0024] This invention provides a temperature measurement system for work rolls in a hot rolling production line, comprising: a hot rolling roll, a distance measuring device, a temperature measuring device, and a main control device. To overcome the shortcomings of manual measurement methods, the system utilizes a distance measuring device to measure the real-time distance of the hot rolling roll as it moves along a designated direction during loading or unloading, thereby obtaining the roll's real-time position. The main control device then controls the temperature measuring device to collect the surface temperature of the hot rolling roll when the real-time distance gradually decreases and falls below the roll body detection set distance (indicating the hot rolling roll has reached the roll body detection position). This allows for convenient, fast, and non-contact measurement of the hot rolling roll surface temperature. Furthermore, temperature collection is only initiated when the hot rolling roll reaches the roll body detection position, ensuring objective and accurate temperature data that provides effective guidance for hot continuous rolling.
[0025] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description
[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0027] Figure 1 A schematic diagram of a temperature measurement system for a hot rolling production line work roll according to an embodiment of the present invention is shown. Detailed Implementation
[0028] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0029] Firstly, such as Figure 1 As shown in the figure, the present invention provides a temperature measurement system for a hot rolling production line work roll, comprising: a hot rolling roll 1, a distance measuring device 2, a temperature measuring device 3, and a main control device 4.
[0030] The hot rolling roll 1 includes a roll bearing housing 11, and the hot rolling roll 1 moves along a specified direction when it is loaded onto or unloaded from the machine.
[0031] The main purpose of this invention is to measure the real-time temperature of the hot rolling roll 1 when it enters or exits the mill. Specifically, the temperature detection of the hot rolling roll 1 exiting the mill is important data for the operating environment of the roll. The higher the strip temperature, the greater the maximum surface temperature of the hot rolling roll 1 during the rolling process. After obtaining the temperature of the hot rolling roll 1 exiting the mill, matching different temperatures of the hot rolling roll 1 exiting the mill with the corresponding steel grades and rolling processes helps to suppress the oxidation of the work rolls and reduce the defects of iron oxide scale on the strip surface. The temperature of the hot rolling roll 1 entering the mill is the initial temperature of the hot rolling roll 1 when it enters the mill. When the temperature of the hot rolling roll 1 entering the mill is too high or too low (higher or lower than the secondary set temperature), it will directly affect the profile crown of the strip when it starts rolling, and may even affect the length genetic calculation. Therefore, once the temperature of the hot rolling roll 1 is collected, it is transmitted in real time to the production line's three-level control system 7, and then to the production line's two-level control system 8. This effectively avoids the problems of strip profile convexity mismatch and long genetic calculation caused by the deviation between the hot rolling roll 1 temperature and the two-level set temperature. Furthermore, there is no lag, which can provide guidance for hot continuous rolling.
[0032] In order to measure the temperature of the hot rolling roll 1 when it is loaded onto or unloaded from the machine, this system uses a combination of a distance measuring device 2 and a temperature measuring device 3 to measure the surface temperature of the hot rolling roll 1, and uses a main control device 4 for overall control.
[0033] The ranging device 2 is installed perpendicular to the designated direction of movement and measures the real-time distance between itself and the hot rolling roll 1 assembly when the hot rolling roll 1 is loaded onto or unloaded. The temperature measuring device 3 is installed in the same location as the ranging device 2. Optionally, they can be arranged at different heights and installed in the same location (see [reference]). Figure 1 The temperature measuring device 3 is mainly used to measure the real-time temperature of the surface of the hot rolling roll 1 when it is loaded onto or unloaded from the machine. The timing of the measurement is controlled by the main control device 4.
[0034] In one optional embodiment, the ranging device 2 is a laser rangefinder.
[0035] In one optional embodiment, the temperature measuring device 3 is an infrared thermometer.
[0036] The main control device 4 is connected to the ranging device 2 and the temperature measuring device 3 respectively.
[0037] In one optional embodiment, the main control device 4 is a PLC. Of course, it can also be other devices, such as a host computer. If the main control device 4 is a host computer, it can be connected to the ranging device 2 via wired means such as data cables, or wireless means such as WIFI or LAN. The connection method for the temperature measuring device 3 is similar and will not be described again here. It is worth noting that all communication connections involved in this utility model can be made using the communication methods described herein; therefore, specific connection methods will not be described again when other communication connections are involved.
[0038] The main control device 4 receives the real-time distance through the data cable. When the real-time distance gradually decreases and becomes less than the set distance for roll detection, the temperature measuring device 3 is controlled to continuously collect the temperature of the surface of the hot rolling roll 1 according to the set emissivity.
[0039] Specifically, since the ranging device 2 is fixedly installed, while the hot rolling roll 1 moves in a specified direction (e.g., Figure 1 The hot rolling roll 1 moves in the direction of the upper part of the machine. The hot rolling roll 1 actually moves closer to the measuring device 2 gradually, reaching its closest point when it is directly below the measuring device 2, and then gradually moves away from the measuring device 2. Therefore, the distance between the hot rolling roll 1 and the measuring device 2 gradually decreases (reaching its minimum when directly below the measuring device 2), and then gradually increases.
[0040] Furthermore, since the hot rolling roll 1 includes the roll bearing housing 11, in order to avoid misdetecting the temperature of the roll bearing housing 11, the main control device 4 compares the adjacent real-time distances to determine whether the temperature is gradually decreasing. Then, using the roll body detection set distance as the standard, when the real-time distance is less than the roll body detection set distance, it indicates that the hot rolling roll 1 has reached the roll body detection position, and the temperature measuring device 3 is activated to collect the temperature of the surface of the hot rolling roll 1.
[0041] For example, the working distance between temperature measuring device 3 and the hot rolling roll 1 (i.e., the roll body detection set distance) is 500mm, and the working distance between temperature measuring device 3 and the roll bearing seat 11 (named: the roll bearing seat 11 detection set distance) is 700mm. The initial emissivity of temperature measuring device 3 is set to 0.45. When the hot rolling roll 1 moves in the specified direction, the distance between the hot rolling roll 1 and the distance measuring device 2 will change according to the following pattern: infinity (considered as infinity when not measurable) - 700 - 500 - minimum distance - 500 - 700 - infinity. Therefore, in order to accurately measure the temperature of the surface of the hot rolling roll 1, the main control device 4 starts the temperature measuring device 3 to collect the temperature of the surface of the hot rolling roll 1 when the real-time distance gradually decreases and is less than 500mm.
[0042] In one optional embodiment, in order to ensure the accuracy of temperature data, if the distance measuring device 2 does not fluctuate significantly for a period of time when the distance is less than the set distance for roller detection, it is considered that the temperature measured by the temperature measuring device 3 is on the surface of the roll.
[0043] Therefore, the main control device 4 is equipped with a built-in or external timer (not shown in the figure), which starts timing when the real-time distance is less than the set distance for roller detection.
[0044] When the real-time distance gradually decreases and the timer for the distance to be less than the set distance for roll detection exceeds a set time, the main control device 4 controls the temperature measuring device 3 to continuously collect the temperature of the surface of the hot rolling roll 1 according to the set emissivity. For example, if the real-time distance gradually decreases and remains within a 500mm range for 300 milliseconds, then the temperature measuring device 3 starts collecting the temperature of the surface of the hot rolling roll 1.
[0045] In an optional embodiment, in order to end the temperature measurement of the hot rolling roll 1, the main control device 4 controls the temperature measuring device 3 to end the temperature measurement when the real-time distance is greater than the roll body detection set distance.
[0046] Of course, even if the distance measuring device 2 and the temperature measuring device 3 are installed in the same position, according to the specified movement direction of the hot rolling roll 1, it will pass through the distance measuring device 2 first and then the temperature measuring device 3. It is possible that the real-time distance between the hot rolling roll 1 and the distance measuring device 2 is greater than 500mm (i.e., the distance measuring device 2 is about to test the roll bearing seat 11), while the roll body of the hot rolling roll 1 is exactly at the temperature measuring device 3. Therefore, the main control device 4, as the real-time distance gradually increases and reaches the set detection distance of the roll bearing seat 11, controls the temperature measuring device 3 to end the measurement. The control logic is relatively simple.
[0047] In one optional embodiment, considering that objects with different surface conditions emit different temperature wavelengths, and that the surface of the roll after it exits the mill may exhibit various states such as rust and shine, the system of this invention further includes a data acquisition device 5 to achieve high-precision measurement of the roll surface temperature. Further, an example of the data acquisition device 5 is an industrial camera.
[0048] The acquisition device 5 and the main control device 4 are communicatively connected; the main control device 4 captures actual images of the hot rolling roll 1 when it is being loaded or unloaded from the machine; the main control device 4 modifies the set emissivity based on the actual images of the hot rolling roll 1. For example, there is a mapping relationship between the degree of corrosion and the set emissivity; the corresponding set emissivity can be determined based on different degrees of corrosion. It is worth noting that current image analysis technology is relatively mature, and this utility model can analyze the degree of corrosion, brightness, etc., using conventional image analysis technology, without any technical obstacles. Furthermore, the focus of this utility model is not on image analysis technology, so the specific analysis process will not be described in detail.
[0049] In an optional embodiment, the system further includes: a production line primary control system 6, which is communicatively connected to the main control device 4;
[0050] The production line's primary control system 6 monitors and records the actual position of the hot rolling roll 1 in real time when it is being loaded or unloaded, and transmits this information to the main control device 4 using existing communication methods. The main control device 4 initiates or terminates real-time distance monitoring based on the actual position. For example, when the actual position of the hot rolling roll 1 gets closer to the distance measuring device and reaches 700mm from the distance measuring device 2, the main control device 4 initiates real-time distance monitoring. When the actual position of the hot rolling roll 1 gets further away from the distance measuring device and reaches 700mm from the distance measuring device 2, the main control device 4 terminates real-time distance monitoring.
[0051] The main purpose of designing the production line primary control system 6 here is to assist the main control equipment 4 in controlling the start and stop of the ranging equipment 2.
[0052] In one optional embodiment, the system further includes: a three-level production line control system 7 and a two-level production line control system 8. The three-level production line control system 7 is communicatively connected to the main control device 4. The two-level production line control system 8 is communicatively connected to the three-level production line control system 7.
[0053] The production line's three-level control system 7 receives continuously collected temperature data from the surface of the hot rolling roll 1 and relays this data to the production line's two-level control system 8. The production line's two-level control system 8 receives the continuously collected temperature data from the surface of the hot rolling roll 1 and performs subsequent control.
[0054] The main control device 4 is sequentially connected to the production line's three-level control system 7 and the production line's two-level control system 8. It can transmit the temperature of the surface of the hot rolling roll 1 continuously collected to the production line's two-level control system 8 in a timely manner without any lag, and can provide guidance for hot continuous rolling.
[0055] This invention provides a temperature measurement system for work rolls in a hot rolling production line, comprising: a hot rolling roll, a distance measuring device, a temperature measuring device, and a main control device. To overcome the shortcomings of manual measurement methods, the system utilizes a distance measuring device to measure the real-time distance of the hot rolling roll as it moves along a designated direction during loading or unloading, thereby obtaining the roll's real-time position. The main control device then controls the temperature measuring device to collect the surface temperature of the hot rolling roll when the real-time distance gradually decreases and falls below the roll body detection set distance (indicating the hot rolling roll has reached the roll body detection position). This allows for convenient, fast, and non-contact measurement of the hot rolling roll surface temperature. Furthermore, temperature collection is only initiated when the hot rolling roll reaches the roll body detection position, ensuring objective and accurate temperature data that provides effective guidance for hot continuous rolling.
[0056] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0057] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.
Claims
1. A temperature measurement system for work rolls in a hot rolling production line, characterized in that, The system includes: Hot rolling rolls move in a specified direction when they are loaded onto or unloaded from the machine. A distance measuring device is installed perpendicular to the specified direction of movement to measure the real-time distance between itself and the hot rolling roll when the hot rolling roll is being loaded onto or unloaded from the machine. The temperature measuring device and the distance measuring device are arranged and installed in the same position; The main control device is connected to the ranging device and the temperature measuring device respectively. The main control device receives the real-time distance through a data cable. When the real-time distance gradually decreases and becomes less than the set distance for roller detection, the main control device controls the temperature measuring device to continuously collect the temperature of the hot rolling roll surface according to the set emissivity.
2. The temperature measurement system as described in claim 1, characterized in that, The system also includes: a data acquisition device, which is communicatively connected to the main control device; the data acquisition device captures actual images of the hot rolling roll when it is being loaded onto or unloaded from the machine. The main control device modifies the set emissivity based on the actual imaging of the hot rolling roll.
3. The temperature measurement system as described in claim 2, characterized in that, The acquisition device is an industrial camera.
4. The temperature measurement system as described in claim 1, further comprising: The production line's primary control system is communicatively connected to the main control equipment; The production line primary control system monitors and records the actual position of the hot rolling roll in real time when it is being loaded onto or unloaded from the machine. The main control device can start monitoring the real-time distance based on the actual location, or stop monitoring the real-time distance.
5. The temperature measurement system as described in claim 1, characterized in that, The main control device is equipped with a built-in or external timer, which starts timing when the real-time distance is less than the set distance for roller detection. When the real-time distance gradually decreases and the timer for the distance to be less than the set distance for roll detection exceeds a set time, the main control device controls the temperature measuring device to continuously collect the temperature of the hot rolling roll surface according to the set emissivity.
6. The temperature measurement system as described in claim 1, characterized in that, The system also includes a three-level production line control system, which is connected to the main control equipment and receives the temperature of the hot rolling roll surface continuously collected.
7. The temperature measurement system as described in claim 6, characterized in that, The system also includes: a secondary control system for the production line, which is communicatively connected to the tertiary control system for the production line, and receives the temperature of the hot rolling roll surface continuously collected.
8. The temperature measurement system as described in claim 1, characterized in that, The ranging device is a laser rangefinder.
9. The temperature measurement system as described in claim 1, characterized in that, The temperature measuring device is an infrared thermometer.
10. The temperature measurement system as described in claim 1, characterized in that, The main control device is a PLC.