On-line temperature control system and method in rolling process of section steel rolled piece

Abstract

The invention discloses an on-line temperature control system and method in the rolling process of section steel rolled pieces, and is applied to the field of rolling of the section steel rolled pieces. The plurality of temperature measuring devices are used for acquiring the detection temperature of the section steel rolled piece; each cooling device comprises a cooling support, at least two vertical limiting rollers and at least two horizontal limiting rollers, and a cooling space allowing the profile steel rolled pieces to be placed in and cooled is defined by the vertical limiting rollers; a plurality of cooling grooves for cooling media to flow out are formed in the horizontal limiting roller in the vertical direction, and nozzles for spraying out the cooling media are arranged in the cooling grooves; and the controller is used for determining the flow and the opening time of the nozzle in the cooling device according to the difference value between the detected temperature and the target temperature. According to the temperature control system, the cooling device is used for cooling the section steel rolled piece, the cooling efficiency and accuracy in the rolling process of the section steel rolled piece can be improved, field process data can be managed and regulated easily, and the process control level of the section steel rolled piece is improved.

Description

Technical Field

[0001] The invention relates to the field of steel section rolling, and in particular to an online temperature control system and method for the steel section rolling process. Background Art

[0002] Steel rolled products are long strips of steel rolled products with certain cross-sectional shapes and sizes. Generally, steel rolled products are formed in one step by rolling.

[0003] In the related art, during the rolling process of steel sections, due to the influence of factors such as the cross-sectional shape, length, and cooling conditions of the steel sections, different positions on the same cross section, that is, different longitudinal positions of the same cross-sectional position, have large temperature differences and fluctuations, which makes it difficult to detect and control the temperature of the steel sections during rolling. At the same time, during the rolling process of the steel sections, problems such as bending, buckling, and torsion that affect the stability of the rolling process are prone to occur, bringing difficulties to the temperature control of the steel sections.

[0004] Therefore, how to effectively improve the rolling quality of steel rolled pieces is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide an online temperature control system and method for the rolling process of steel rolled pieces, which are used to improve the cooling efficiency and accuracy of the steel rolled pieces during the rolling process and improve the processing accuracy.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An online temperature control system for a steel section rolling process, comprising:

[0008] A rolling roller table is installed on the rolling line to place the steel rolled piece and drive the steel rolled piece to move;

[0009] A plurality of temperature measuring devices, each of which is arranged at intervals along the extension direction of the rolling line, and the temperature measuring devices are used to obtain the detection temperature of the steel rolled piece;

[0010] A plurality of cooling devices, each of which is arranged at intervals along the extension direction of the rolling line, and the cooling devices include a cooling support and at least two vertical limiting rollers and at least two horizontal limiting rollers installed on the cooling support, and a cooling space for the steel section rolled piece to be placed and cooled is formed between each of the vertical limiting rollers and each of the vertical limiting rollers; the horizontal limiting rollers extend in the vertical direction, and the horizontal limiting rollers are provided with a plurality of cooling grooves in the vertical direction for the cooling medium to flow out, and nozzles for the cooling medium to be sprayed out are provided in the cooling grooves;

[0011] A controller is connected to the temperature measuring device and the cooling device, and is used to determine the flow rate and opening time of the nozzle in the cooling device according to the difference between the detected temperature and the target temperature.

[0012] On the other hand, it also includes a supporting body, the rolling roller, the temperature measuring device and the cooling device are all installed on the supporting body, and the distance between adjacent cooling devices is adjustable.

[0013] On the other hand, a slide is provided on the support body, the cooling device is installed on the slide, and the cooling device can slide relative to the slide; the cooling device also includes a locking component, and the locking component is used to lock the cooling device and the slide after the cooling device moves to the target position.

[0014] On the other hand, it also includes a driving component, which includes a fixed part and a telescopic part, the fixed part is installed on the slide, and the telescopic part is connected to the cooling support; the controller is connected to the driving component and is used to control the action of the driving component to change the position of the cooling support according to the cooling requirements of the steel rolled piece.

[0015] On the other hand, each of the vertical limiting rollers is symmetrically arranged relative to the steel section rolled piece, and the axial direction of the vertical limiting roller extends in the horizontal direction and is perpendicular to the extension direction of the steel section rolled piece; each of the horizontal limiting rollers is symmetrically arranged relative to the steel section rolled piece, and the axial direction of the horizontal limiting roller extends in the vertical direction and is perpendicular to the extension direction of the steel section rolled piece.

[0016] On the other hand, there are gaps between the vertical limiting roller and the steel section rolled piece, and between the horizontal limiting roller and the steel section rolled piece, and the positions of the vertical limiting roller and the horizontal limiting roller in the same cooling device correspond to each other.

[0017] On the other hand, the cooling groove includes a first groove, a second groove and a third groove, the first groove and the third groove are respectively located at one-third and two-thirds of the flange height of the steel section rolled piece, and the second groove is located in the middle of the flange height of the steel section rolled piece.

[0018] On the other hand, the vertical limiting roller and the horizontal limiting roller are both installed on the cooling bracket in an adjustable manner. The vertical limiting roller is adjustable in the vertical direction relative to the cooling bracket, and the horizontal limiting roller is adjustable in the horizontal direction relative to the cooling bracket.

[0019] An online temperature control method for a steel section rolling process comprises the following steps:

[0020] Determining a target temperature of the steel section rolled piece within a target range;

[0021] Acquiring a detected temperature of the steel section rolled piece at the inlet of the cooling device, and determining a difference between the detected temperature and a target temperature according to the detected temperature;

[0022] Determine the water spraying amount and opening time of the nozzle according to the difference, and control the nozzle to start according to the water spraying amount and the opening time;

[0023] The detected temperature of the steel rolled piece at the rear section of the cooling device is obtained, and when the difference between the detected temperature and the target temperature is greater than the target difference, the water spraying amount and the opening time of the nozzle are adjusted.

[0024] On the other hand, the target range is the head range, the middle range and the tail range of the steel rolled piece, and the head range, the middle range and the tail range are sequentially connected;

[0025] Also includes the steps:

[0026] According to the target range, a target distance between adjacent cooling devices is determined, and the positions of the cooling devices are adjusted according to the target distance.

[0027] The online temperature control system for the rolling process of a steel rolled piece provided by the present invention comprises: a rolling roller table, which is installed on the rolling line, for placing the steel rolled piece and driving the steel rolled piece to move; a plurality of temperature measuring devices, each of which is arranged at intervals along the extension direction of the rolling line, and the temperature measuring devices are used to obtain the detected temperature of the steel rolled piece; a plurality of cooling devices, each of which is arranged at intervals along the extension direction of the rolling line, and the cooling devices comprise a cooling support and at least two vertical limit rollers and at least two horizontal limit rollers installed on the cooling support, and a cooling space for placing and cooling the steel rolled piece is formed between each of the vertical limit rollers and each of the vertical limit rollers; the horizontal limit roller extends in the vertical direction, and the horizontal limit roller is provided with a plurality of cooling grooves in the vertical direction for the cooling medium to flow out, and a nozzle for spraying the cooling medium is provided in the cooling groove; a controller, which is connected to the temperature measuring device and the cooling device, and is used to determine the flow rate and opening time of the nozzle in the cooling device according to the difference between the detected temperature and the target temperature. The online temperature control system for the rolling process of steel sections provided by the present invention can improve the cooling efficiency and accuracy of the steel sections during the rolling process by detecting the temperature of the steel sections at different positions and using the cooling device to cool the steel sections, which is beneficial to the management and regulation of on-site process data and the improvement of the process control level of the steel sections.

[0028] The online temperature control method for the rolling process of a steel section provided by the present invention comprises the following steps: determining the target temperature of the steel section within the target range; obtaining the detected temperature of the steel section at the inlet of the cooling device, and determining the difference between the detected temperature and the target temperature according to the detected temperature; determining the water spraying amount and the opening time of the nozzle according to the difference, and controlling the start of the nozzle according to the water spraying amount and the opening time; obtaining the detected temperature of the steel section at the rear section of the cooling device, and adjusting the water spraying amount and the opening time of the nozzle when the difference between the detected temperature and the target temperature is greater than the target difference. The online temperature control method for the rolling process of a steel section provided by the present invention can determine the water spraying amount and the opening time of the nozzle according to the difference between the detected temperature of the steel section and the target temperature, which is conducive to control according to the real-time temperature of the steel section, and improves the efficiency and accuracy of cooling during steel rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A structural schematic diagram of a specific implementation of the online temperature control system for the rolling process of a steel section rolled piece provided by the present invention;

[0031] Figure 2 The present invention provides a flow chart of the online temperature control method for the rolling process of steel section rolled pieces.

[0032] Reference numerals:

[0033] Steel rolled piece 100; temperature measuring device 200; cooling device 300; horizontal limiting roller 301; cooling groove 3011; vertical limiting roller 302; supporting roller 400. DETAILED DESCRIPTION

[0034] The core of the present invention is to provide an online temperature control system and method for the rolling process of steel rolled pieces, which can conveniently control the temperature of the steel rolled pieces and improve the rolling quality of the steel rolled pieces.

[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Please refer to Figure 1 , Figure 1The present invention is a schematic structural diagram of a specific implementation of the online temperature control system for the rolling process of steel rolled pieces provided by the present invention.

[0037] In this embodiment, the online temperature control system for the rolling process of the steel rolled piece 100 includes:

[0038] A rolling roller table is installed on the rolling line, for placing the steel section rolled piece 100 and driving the steel section rolled piece 100 to move;

[0039] A plurality of temperature measuring devices 200, each of which is arranged at intervals along the extension direction of the rolling line, and the temperature measuring devices 200 are used to obtain the detection temperature of the steel rolled piece 100;

[0040] A plurality of cooling devices 300, each of which is arranged at intervals along the extension direction of the rolling line, and the cooling devices 300 include a cooling support and at least two vertical limiting rollers 302 and at least two horizontal limiting rollers 301 installed on the cooling support, and a cooling space for placing and cooling the steel rolled piece 100 is formed between each vertical limiting roller 302; the horizontal limiting roller 301 extends in the vertical direction, and the horizontal limiting roller 301 is provided with a plurality of cooling grooves 3011 for the cooling medium to flow out in the vertical direction, and a nozzle for the cooling medium to be sprayed out is provided in the cooling groove 3011;

[0041] The controller is connected to the temperature measuring device 200 and the cooling device 300, and is used to determine the flow rate and opening time of the nozzle in the cooling device 300 according to the difference between the detected temperature and the target temperature.

[0042] Specifically, the cooling medium can be water or other liquids; of course, the steel rolled piece can also be cooled by aerosol through a nozzle; the temperature measuring device 200 can be installed between the cooling devices 300. For the convenience of control, at least one temperature measuring device 200 can be arranged at the front end of each cooling device 300. The temperature measuring device 200 can obtain the temperature of the steel rolled piece 100 at the corresponding position in real time and send it to the controller; the horizontal limiting roller 301 extends in the vertical direction, and the vertical limiting roller 302 extends in the horizontal direction. Through the surrounding arrangement of the vertical limiting rollers 302 and the vertical limiting rollers 302, not only the steel rolled piece can be cooled, but also the temperature of the steel rolled piece can be cooled. The lateral position of 100 is limited, and it is beneficial to the setting of the nozzle. By setting the cooling groove 3011 on the horizontal limiting roller 301, the horizontal limiting roller 301 is arranged in contact with the side of the steel-shaped rolled piece 100. After the cooling medium is ejected from the nozzle, it can be sprayed on the side wall of the steel-shaped rolled piece 100 at the fastest speed, and the cooling efficiency is high. A guide can be set on the inlet side of each cooling device to facilitate the steel-shaped rolled piece 100 to enter the cooling device. The system also includes support rollers 400 to support the steel-shaped rolled piece 100. The number of support rollers 400 is at least two, and the two ends of the steel-shaped rolled piece 100 are placed on the support rollers 400.

[0043] In some embodiments, a supporting body is also included, and the rolling roller, the temperature measuring device 200 and the cooling device 300 are all installed on the supporting body, and the distance between adjacent cooling devices 300 is adjustable; the cooling device 300 is movably installed on the supporting body, and the position of the cooling device 300 can be set as needed. For example, when the temperature of the front end of the steel section rolled piece 100 is high, the spacing between the cooling devices 300 arranged at the front end of the steel section rolled piece 100 can be smaller than the spacing between the cooling devices 300 arranged at the rear end of the steel section rolled piece 100, thereby improving the accuracy and efficiency of temperature regulation at the front end of the steel section rolled piece 100.

[0044] In some embodiments, a slide is provided on the supporting body, and the cooling device 300 is installed on the slide, and the cooling device 300 can slide relative to the slide; the cooling device 300 also includes a locking component, and the locking component is used to lock the cooling device 300 and the slide after the cooling device 300 moves to the target position; specifically, through the setting of the slide, the position adjustment of the cooling device 300 can be facilitated. Of course, in order to ensure the position stability of the cooling device 300 during use, a locking component is also provided. The locking component can be a cylinder or a block provided on the slide, and a locking groove can be provided on the locking component. The position of the cooling device 300 is locked through the cooperation of the cylinder or the block and the locking groove.

[0045] In some embodiments, a driving component is further included, the driving component includes a fixed part and a telescopic part, the fixed part is installed on the slideway, and the telescopic part is connected to the cooling support; the controller is connected to the driving component, and is used to control the action of the driving component according to the cooling requirements of the steel rolled piece 100 to change the position of the cooling support; through the above settings, the controller can be used to achieve automatic control, for example, when the temperature detection component detects that the temperature of a certain position of the steel rolled piece 100 is too high, the nearby cooling device 300 can be moved to the corresponding position by the driving component. Further, the cooling condition of the steel rolled piece 100 is determined according to the target temperature or cooling rate in the process requirements. For example, for H-shaped steel rolled pieces 100 with a flange thickness of less than 15 mm, since the cooling condition of the H-shaped steel rolled piece 100 itself is good, the spacing between the cooling devices 300 can be increased; for H-shaped steel rolled pieces 100 with a flange thickness of more than 20 mm, since the cooling condition of the H-shaped steel rolled piece 100 itself is poor, the spacing between the cooling devices 300 can be reduced, the cooling water volume of the cooling device 300 can be increased, and even a new cooling device 300 can be added.

[0046] In some embodiments, each vertical limiting roller 302 is symmetrically arranged relative to the steel rolled piece 100, and the axial direction of the vertical limiting roller 302 extends in the horizontal direction and is perpendicular to the extension direction of the steel rolled piece 100; each horizontal limiting roller 301 is symmetrically arranged relative to the steel rolled piece 100, and the axial direction of the horizontal limiting roller 301 extends in the vertical direction and is perpendicular to the extension direction of the steel rolled piece 100; through the symmetrical arrangement, it can play a good guiding role in the movement of the steel rolled piece 100, with high precision and position stability, and it is easy to assemble and can be installed symmetrically. Further, the axial width of the vertical limiting roller 302 should be smaller than the web width of the steel rolled piece 100, so that the vertical limiting roller 302 can be close to the web. The distance between each vertical limiting roller 302 or each horizontal limiting roller 301 and the steel section rolled piece 100 should not be too large, otherwise the constraint on the steel section rolled piece 100 will be weak, which is not conducive to controlling the stability of the steel section rolled piece 100 and is also not conducive to the cooling of the designated flange position; the distance between each vertical limiting roller 302 or each horizontal limiting roller 301 and the steel section rolled piece 100 should not be too small, otherwise friction may be generated between the steel section rolled piece 100 and the rollers, which is not conducive to the advancement of the steel section rolled piece 100.

[0047] In some embodiments, a gap is provided between the vertical limiting roller 302 and the steel section rolled piece 100, as well as between the horizontal limiting roller 301 and the steel section rolled piece 100 to reduce friction, and the positions of the vertical limiting roller 302 and the horizontal limiting roller 301 in the same cooling device 300 correspond to each other, ensuring that the vertical limiting roller 302 and the horizontal limiting roller 301 in the same cooling device 300 can limit the same position of the steel section rolled piece 100.

[0048] In some embodiments, the cooling groove 3011 includes a first groove, a second groove and a third groove, the first groove and the third groove are respectively located at one-third and two-thirds of the flange height of the steel section rolled piece 100, and the second groove is located in the middle of the flange height of the steel section rolled piece 100; such a setting can enable each cooling groove 3011 on the horizontal limiting roller 301 to cool different positions of the flange height of the steel section rolled piece 100 respectively, thereby improving the efficiency of the steel section rolled piece 100; specifically, the first groove, the second groove and the third groove can be respectively set according to different cooling requirements at different positions on the steel section rolled piece 100. For example, the cooling of the middle position of the flange height of the steel section rolled piece 100 is slower, and the density of the nozzles in the second groove can be set to be greater than the density of the nozzles in the first groove and the second groove. Specifically, under normal circumstances, the web of the H-shaped steel rolled piece 100 cools faster and has a lower temperature than the flange. Therefore, the height of the first groove should be lower than the height of the flange to prevent the cooling medium from splashing into the web and cooling the web, which increases the temperature difference between the web and the flange and is not conducive to the control of the plate shape.

[0049] In some embodiments, the vertical limit roller 302 and the horizontal limit roller 301 are both installed on the cooling support in an adjustable manner. The vertical limit roller 302 is adjustable in the vertical direction relative to the cooling support, and the horizontal limit roller 301 is adjustable in the horizontal direction relative to the cooling support. Such a configuration can facilitate assembly with the steel section workpiece 100. Before the steel section workpiece 100 moves to the cooling device 300, the vertical limit roller 302 and the horizontal limit roller 301 can be adjusted to the side away from the steel section workpiece 100. After the steel section workpiece 100 moves to the cooling device 300, the vertical limit roller 302 and the horizontal limit roller 301 are adjusted to be close to the steel section workpiece 100 according to the position of the steel section workpiece 100. The change in the distance between the horizontal limit roller 301 and the steel section workpiece 100 can change the cooling efficiency. The closer the distance between the horizontal limit roller 301 and the steel section workpiece 100, the higher the cooling efficiency.

[0050] In some embodiments, a plurality of nozzles are distributed around the bottom surface of the cooling groove 3011, and the nozzles are water nozzles or aerosol nozzles; and the types of nozzles between adjacent cooling devices 300 are different, thereby improving applicability.

[0051] In some embodiments, a temperature measuring device 200 is provided at the inlet and outlet of each cooling device 300, which has higher detection accuracy. The temperature measuring device 200 at the outlet of the cooling device 300 can be fed back to the controller to control the water spraying amount and the opening and closing time of the cooling medium in the cooling device 300.

[0052] Please refer to Figure 2 , Figure 2 The figure is a flow chart of the online temperature control method for the rolling process of the steel section rolled piece 100 provided by the present invention.

[0053] In addition to the above-mentioned online temperature control system for the rolling process of the steel section rolled piece 100, the present invention also provides an online temperature control method for the rolling process of the steel section rolled piece 100.

[0054] The online temperature control method for the rolling process of the steel rolled piece 100 comprises the following steps:

[0055] Step S1: determining a target temperature of the steel rolled piece 100 within a target range;

[0056] Step S2: acquiring the detected temperature of the steel rolled piece 100 at the entrance of the cooling device 300, and determining the difference between the detected temperature and the target temperature according to the detected temperature;

[0057] Step S3: determining the water spraying amount and opening time of the nozzle according to the difference, and controlling the nozzle to start according to the water spraying amount and the opening time;

[0058] Step S4: acquiring the detected temperature of the steel rolled piece 100 at the rear section of the cooling device 300, and when the difference between the detected temperature and the target temperature is greater than the target difference, adjusting the water spraying amount and the opening time of the nozzle.

[0059] The online temperature control method for the rolling process of the steel section rolled piece 100 provided by the present invention can determine the water spraying amount and opening time of the nozzle according to the difference between the detected temperature of the steel section rolled piece 100 and the target temperature, which is conducive to controlling according to the real-time temperature of the steel section rolled piece 100 and improving the cooling efficiency and accuracy during the steel rolling process.

[0060] Specifically, in a specific embodiment, the online temperature control method for the rolling process of the steel rolled piece 100 includes the following steps:

[0061] Step S1: obtaining a first detected temperature of the steel rolled piece 100 at the front end of the previous cooling device 300, and determining a difference between the first detected temperature and a target temperature according to the detected temperature;

[0062] Step S2: controlling the water spraying amount and opening time of the nozzle according to the difference, and controlling the nozzle to start according to the water spraying amount and opening time;

[0063] Step S3: Obtain the second detected temperature of the steel rolled piece 100 at the rear section of the previous cooling device 300, and when the difference between the second detected temperature and the target temperature is greater than the target difference, control the water spraying amount and opening time of the nozzle in the next cooling device 300.

[0064] In some embodiments, the target range is the head range, the middle range and the tail range of the steel rolled piece 100, and the head range, the middle range and the tail range are connected in sequence;

[0065] Also includes the steps:

[0066] According to the target range, the target spacing between adjacent cooling devices 300 is determined, and the position of the cooling device 300 is adjusted according to the target spacing; such a setting can facilitate the adjustment of the position of the cooling device 300, and further improve the accuracy of the system for the temperature of the steel rolled piece 100.

[0067] In a specific embodiment, the steel rolled piece 100 enters the temperature control system through a roller table, and the temperature measuring device 200 measures the temperature of the steel rolled piece 100; the cooling device 300 laterally constrains and fixes the steel rolled piece 100, and cools the steel rolled piece 100 at the same time; the system is set in the rolling process, and the roller table is the roller table in the rolling process; when the steel rolled piece 100 is temperature-measured, constrained and cooled in the system, the steel rolled piece 100 is in motion, and temperature measurement, laterally constrained and cooled are performed while moving; each cooling device 300 is composed of four rollers, including two horizontal limit rollers 301 and two vertical limit rollers 302, each roller can be set as a driven roller, and can also be set as a driving roller; each roller can be set as a flat roller, and can also be set as a special-shaped roller. In each cooling device 300, the horizontal limiting roller 301 can move in the vertical direction to adjust the distance between the horizontal limiting roller 301 and the steel section rolled piece 100; the vertical limiting roller 302 can also move in the horizontal direction to adjust the distance between the vertical limiting roller 302 and the steel section rolled piece 100 to realize the constraint of the steel section rolled piece 100. There is a gap between the horizontal limiting roller 301 and the steel section rolled piece 100, and between the vertical limiting roller 302 and the steel section rolled piece 100, that is, the horizontal limiting roller 301 and the vertical limiting roller 302 do not press down on the steel section rolled piece 100. A cooling groove 3011 is set on the roller of the cooling device 300, and a nozzle is set at the position of the cooling groove 3011 to spray water cooling or gas mist cooling on the steel section rolled piece 100. The setting of the cooling groove 3011 is set according to the specifications and cooling requirements of the steel section rolled piece 100. A guide can be provided at the entrance side of each cooling device 300 to facilitate the steel rolled piece 100 to enter the device. There is a linkage between the temperature measuring device 200 and the cooling device 300. After the target cooling temperature is set, the detected temperature of the temperature measuring device 200 is compared with the target temperature. If the detected temperature is higher than the target temperature, the corresponding cooling device 300 is controlled to increase the cooling effect; if the detected temperature is lower than the target temperature, the corresponding cooling device 300 is controlled to reduce the cooling effect. The temperature control system can achieve the same temperature control in the length direction for the same steel rolled piece 100, and can also achieve different temperature control at the head, middle and tail in the length direction.

[0068] The system can be set up with primary and secondary control systems to achieve automatic temperature control. Specifically, the primary control is mainly used for temperature measurement, water volume adjustment, positioning of rolled pieces, etc.; the secondary control is mainly used for temperature and water volume calculation. The water volume is calculated based on the difference between the actual temperature and the target temperature, and then transmitted to the primary control.

[0069] The system can be provided with a plurality of cooling devices 300 and temperature measuring devices 200 to achieve continuous cooling and temperature measurement of the steel rolled piece 100. The cooling device 300 can move longitudinally to adjust the gap between the devices according to the cooling condition, the restrained condition or the specification of the steel rolled piece 100.

[0070] Specifically, after a certain specification of H-shaped steel rolled piece 100 is hot-rolled, an online temperature control system is set before entering the cooling bed. After the steel rolled piece 100 leaves the finished product rack, it directly enters the temperature control system through the roller. The spacing between the three cooling devices 300 is 2.5-3.5m, which can be 3m. When the cooling medium flow of the cooling device 300 is consistent, too large a spacing between the cooling devices 300 will reduce the cooling rate, and too small a spacing will cause the cooling rate to be too fast, thereby affecting the organizational state of the steel rolled piece 100; the horizontal limiting roller 301 in the cooling device 300 is not provided with a cooling groove 3011, and the vertical limiting roller 302 is provided with a cooling groove 3011 for water spray cooling. The cooling groove 3011 is located below the flange height to prevent cooling water from entering the web position. The cooling device 300 performs lateral constraints on the rolled steel piece 100 and sprays water to cool the flange of the H-shaped steel piece 100; temperature measuring devices 200 are arranged when the rolled steel piece 100 enters the cooling device 300, between the cooling devices 300, and when the rolled steel piece 100 exits the cooling device 300. The cooling device 300 and the temperature measuring device 200 form a linkage, and the cooling device 300 is adjusted according to the detected temperature and the target temperature to finally meet the target temperature control requirement.

[0071] The above is a detailed introduction to the online temperature control system and method for the rolling process of steel rolled pieces provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An online temperature control system for a steel section rolled piece (100) during a rolling process, characterized in that: include: A rolling roller table, installed on a rolling line, for placing a steel section rolled piece (100) thereon and driving the steel section rolled piece (100) to move; A plurality of temperature measuring devices (200), each of the temperature measuring devices (200) being arranged at intervals along the extension direction of the rolling line, and the temperature measuring devices (200) being used to obtain the detection temperature of the steel section rolled piece (100); A plurality of cooling devices (300), each of the cooling devices (300) being arranged at intervals along the extension direction of the rolling line, the cooling devices (300) comprising a cooling support and at least two vertical limiting rollers (302) and at least two horizontal limiting rollers (301) mounted on the cooling support, each of the vertical limiting rollers (302) and each of the vertical limiting rollers (302) forming a cooling space for the steel section rolled piece (100) to be placed and cooled; the horizontal limiting rollers (301) extending in the vertical direction, and the horizontal limiting rollers (301) being provided with a plurality of cooling grooves (3011) in the vertical direction for cooling medium to flow out, and nozzles for spraying the cooling medium being provided in the cooling grooves (3011); A controller is connected to the temperature measuring device (200) and the cooling device (300), and is used to determine the flow rate and opening time of the nozzle in the cooling device (300) according to the difference between the detected temperature and the target temperature.

2. The online temperature control system for the rolling process of a steel rolled piece (100) according to claim 1, characterized in that: It also comprises a supporting body, on which the rolling roller, the temperature measuring device (200) and the cooling device (300) are all mounted, and the distance between adjacent cooling devices (300) is adjustable.

3. The online temperature control system for the rolling process of a steel rolled piece (100) according to claim 2, characterized in that: The support body is provided with a slideway, the cooling device (300) is mounted on the slideway, and the cooling device (300) can slide relative to the slideway; the cooling device (300) further comprises a locking component, the locking component being used to lock the cooling device (300) and the slideway after the cooling device (300) moves to a target position.

4. The online temperature control system for the rolling process of a steel rolled piece (100) according to claim 3, characterized in that: It also includes a driving component, the driving component including a fixed part and a telescopic part, the fixed part is installed on the slideway, and the telescopic part is connected to the cooling support; the controller is connected to the driving component and is used to control the action of the driving component to change the position of the cooling support according to the cooling requirement of the steel rolled piece (100).

5. The online temperature control system for rolling a steel rolled piece (100) according to claim 1, characterized in that: Each of the vertical limiting rollers (302) is symmetrically arranged relative to the steel section rolled piece (100), and the axial direction of the vertical limiting roller (302) extends in the horizontal direction and is perpendicular to the extension direction of the steel section rolled piece (100); each of the horizontal limiting rollers (301) is symmetrically arranged relative to the steel section rolled piece (100), and the axial direction of the horizontal limiting roller (301) extends in the vertical direction and is perpendicular to the extension direction of the steel section rolled piece (100).

6. The online temperature control system for the rolling process of a steel rolled piece (100) according to claim 5, characterized in that: A gap is provided between the vertical limiting roller (302) and the steel section rolled piece (100), and a gap is provided between the horizontal limiting roller (301) and the steel section rolled piece (100), and the positions of the vertical limiting roller (302) and the horizontal limiting roller (301) in the same cooling device (300) correspond to each other.

7. The online temperature control system for the rolling process of a steel rolled piece (100) according to any one of claims 1 to 6, characterized in that: The cooling groove (3011) comprises a first groove, a second groove and a third groove, the first groove and the third groove being located at one-third and two-thirds of the flange height of the steel section rolled piece (100) respectively, and the second groove being located at the middle of the flange height of the steel section rolled piece (100).

8. The online temperature control system for the rolling process of a steel rolled piece (100) according to any one of claims 1 to 6, characterized in that: The vertical limiting roller (302) and the horizontal limiting roller (301) are both mounted on the cooling support in an adjustable manner; the vertical limiting roller (302) is adjustable in the vertical direction relative to the cooling support, and the horizontal limiting roller (301) is adjustable in the horizontal direction relative to the cooling support.

9. An online temperature control method for a steel section rolled piece (100) during a rolling process, using the online temperature control system for a steel section rolled piece (100) during a rolling process as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Determining a target temperature of the steel section rolled piece (100) within a target range; Acquiring a detected temperature of the steel section rolled piece (100) at the entrance of the cooling device (300), and determining a difference between the detected temperature and a target temperature according to the detected temperature; Determine the water spraying amount and opening time of the nozzle according to the difference, and control the nozzle to start according to the water spraying amount and the opening time; The detected temperature of the steel rolled piece (100) at the rear section of the cooling device (300) is obtained, and when the difference between the detected temperature and the target temperature is greater than the target difference, the water spraying amount and the opening time of the nozzle are adjusted.

10. The method for online temperature control during the rolling process of a steel rolled piece (100) according to claim 9, characterized in that: The target range is a head range, a middle range and a tail range of the steel section rolled piece (100), the head range, the middle range and the tail range being connected in sequence; Also includes the steps: According to the target range, a target spacing between adjacent cooling devices (300) is determined, and the position of the cooling device (300) is adjusted according to the target spacing.

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