Device and method for preventing uneven section rolled steel on cooling bed from bending
By installing jet pipes and monitoring mechanisms on the cooling bed, the jet volume and jet point can be adjusted in real time, solving the bending problem caused by uneven temperature during the steel rolling cooling process. This achieves the straightening of uneven cross-section steel rolling, improving the cooling effect and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING JINGCHENG RUIXINCHANGCAI ENG TECH
- Filing Date
- 2024-10-15
- Publication Date
- 2026-04-17
AI Technical Summary
During the cooling process of steel rolling, the unevenness of the cross-section causes the rolled piece to bend laterally, especially on the cooling bed. Existing technologies are not effective in preventing the bending of irregularly shaped steel sections such as bulb flats or L-shaped steel.
A combination of air cooling and monitoring mechanisms is employed. Multiple jet pipes are installed on the cooling bed, with the nozzles of the jet pipes pointing towards the thick section of the rolled steel. The opening of the jet pipes is controlled in real time by the monitoring mechanism, and the jet volume and jet point are adjusted to achieve uniform cooling of the thick and thin sections and prevent bending.
This effectively prevents the bending of rolled steel on the cooling bed caused by uneven temperature distribution, resulting in relatively straight rolled steel products with uneven cross-sections, thus improving the cooling effect and product quality.
Smart Images
Figure CN121869883A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steel rolling production technology, and in particular to a device and method for preventing bending of steel rolled on an uneven cross-section on a cooling bed. Background Technology
[0002] Special-shaped steel sections such as bulb flats and L-beams are widely used in shipbuilding. With the current vigorous development of the marine economy, the market demand for marine bulb flats and L-beams is enormous. Therefore, optimizing production processes and improving product quality through various means during the rolling process is a goal that manufacturers are currently striving to achieve.
[0003] Bulb flats are a type of irregularly shaped steel section. After hot rolling, they are cooled to room temperature in air. During the cooling process, the unevenness of the cross-section causes the rolled piece to easily develop significant lateral bending. If the rolled piece is too long, the resulting lateral bending can prevent it from entering the downstream straightening process.
[0004] Currently, many manufacturers use pre-bending trolleys before the cooling bed to prevent lateral bending of the rolled pieces, but the effect is not ideal. This is because bulb flat steel has a completely asymmetrical cross-section without a central axis of symmetry, making it difficult to guarantee that the rolled piece will not develop defects such as warping after pre-bending. Some manufacturers have considered installing water-cooling devices on the roller conveyor after the rolled piece exits the mill to quickly lower the temperature of high-temperature areas using cooling water. However, the effect is also poor because the rolled piece travels at a relatively high speed on the roller conveyor, and water cooling has a short cooling time and high cooling intensity. Furthermore, there are many specifications for steel sections, and improper parameter settings can easily lead to uneven cooling of the rolled piece cross-section, making parameter adjustment difficult. Summary of the Invention
[0005] The purpose of this invention is to provide a device to prevent bending of rolled steel with uneven cross-section on the cooling bed, and to solve the problem of uneven temperature distribution during the cooling process of irregular cross-section steel such as bulb flat steel or L-shaped steel, which leads to side bending of the rolled piece.
[0006] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:
[0007] This invention provides a device for preventing bending of rolled steel with uneven cross-section on a cooling bed, comprising: an air-cooling mechanism having multiple air jet pipes, the multiple air jet pipes being spaced apart along the running direction of the rolled steel on the cooling bed, the nozzles of the air jet pipes being positioned towards the thick section of the rolled steel, the air jet pipes being provided on both the inner and outer sides of the thick section of the rolled steel, and control valves being provided on the air jet pipes; and a monitoring mechanism, positioned above the cooling bed and facing the rolled steel, the monitoring mechanism being electrically connected to the control valves, the monitoring mechanism being able to control the opening degree of the control valves on each air jet pipe according to the bending condition of the rolled steel.
[0008] Specifically, when the monitoring mechanism detects that the rolled steel is bent, the monitoring mechanism controls to reduce the opening of the control valve on the jet pipe with the nozzle facing the direction of bending, and controls to increase the opening of the control valve on the jet pipe with the nozzle facing the direction of reverse bending.
[0009] Preferably, the length direction of the rolled steel is the same as its running direction on the cooling bed, and the air cooling mechanism includes multiple rows of pipe groups arranged side by side along the width direction of the rolled steel, each row of pipe groups including multiple jet pipes spaced apart along the running direction of the rolled steel on the cooling bed.
[0010] Preferably, the rolled steel is placed on the cooling bed via a toothed straightening plate, and the toothed straightening plate has air holes that communicate with the nozzle of the jet pipe.
[0011] Preferably, the rolled steel is a bulb flat steel, and the jet pipe includes a first jet pipe and a second jet pipe. The nozzle of the first jet pipe is disposed facing the inner side of the bulb head of the bulb flat steel, and the nozzle of the second jet pipe is disposed facing the outer side of the bulb head of the bulb flat steel.
[0012] Preferably, the monitoring mechanism includes a monitor and a controller, the controller being electrically connected to both the monitor and the control valve. The monitor is used to acquire the bending status signal of the rolled steel, and the controller is used to receive the bending status signal of the rolled steel and correspondingly control the opening degree of the control valve on each of the jet pipes.
[0013] Preferably, the monitor includes multiple cameras spaced apart, which can provide full coverage monitoring of the rolled steel.
[0014] Preferably, the air-cooling mechanism further includes an air compressor, which is connected to multiple jet pipes via a main pipe.
[0015] Another object of the present invention is to provide a method for preventing uneven cross-section steel rolling on a cooling bed using the device described above, comprising: after the steel rolling is placed on the cooling bed, controlling the control valve to open through a monitoring mechanism to conduct the jet cooling pipe and perform jet cooling on the thick section of the steel rolling; during the jet cooling process, when the monitoring mechanism detects that the steel rolling has bent, controlling the opening of the control valve on the jet cooling pipe with the nozzle facing the bending direction to decrease, and controlling the opening of the control valve on the jet cooling pipe with the nozzle facing the opposite bending direction to increase, until the steel rolling temperature is reduced to a preset temperature.
[0016] Preferably, both the thick and thin sections of the rolled steel are equipped with temperature sensors. The temperature sensors transmit the detected temperature signals of the thick and thin sections of the rolled steel to the monitoring mechanism. The monitoring mechanism controls the opening of the control valves on each of the jet pipes according to the bending of the rolled steel and the received temperature signals, so that the thick and thin sections of the rolled steel are cooled evenly.
[0017] The features and advantages of this invention are as follows: The device for preventing uneven cross-section steel rolling bending on the cooling bed is installed on the cooling bed, making full use of the advantage that the air cooling time on the cooling bed is long enough and the steel deformation is slow. On the basis of air cooling, an air cooling mechanism is set up to force air cooling on the thick section of the steel rolling with higher temperature, so that the temperature of the thick section and the thin section of the steel rolling tends to be consistent, thereby preventing the steel rolling from bending greatly due to uneven temperature distribution. At the same time, a detection mechanism is set up to monitor the bending of the steel rolling in real time and control the opening of the control valve on the jet pipe accordingly, so as to control the bending amount of uneven cross-section steel rolling on the cooling bed in real time, thereby obtaining a relatively straight uneven cross-section steel rolling product. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the installation of the device for preventing bending of uneven cross-section rolled steel on the cooling bed provided in the embodiment of the present invention on the cooling bed.
[0020] Figure 2 This is a schematic diagram of the air-cooling mechanism in the device for preventing bending of unevenly cut rolled steel on the cooling bed provided in an embodiment of the present invention.
[0021] Explanation of icon numbers:
[0022] 1. Cold bed;
[0023] 2. Air-cooling mechanism; 21. First jet duct; 22. Second jet duct; 23. Control valve;
[0024] 3. Monitoring agency; 31. Camera;
[0025] 4. Steel rolling;
[0026] 5. Tooth straightening plate. Detailed Implementation
[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0028] like Figure 1 and Figure 2 As shown, this invention provides a device for preventing the bending of an unevenly cut rolled steel 4 on a cooling bed 1. The device includes an air-cooling mechanism 2 and a monitoring mechanism 3. The air-cooling mechanism 2 has multiple air jet pipes spaced apart along the running direction of the rolled steel 4 on the cooling bed 1. The nozzles of the air jet pipes face the thicker section of the rolled steel 4. Air jet pipes are located on both the inner and outer sides of the thicker section of the rolled steel 4, and control valves 23 are installed on the air jet pipes. The monitoring mechanism 3 is positioned above the cooling bed 1, directly opposite the rolled steel 4. The monitoring mechanism 3 is electrically connected to the control valves 23 and can control the opening degree of the control valves 23 on each air jet pipe according to the bending condition of the rolled steel 4. This allows for real-time control of the amount of bending of the unevenly cut rolled steel 4 on the cooling bed 1.
[0029] Specifically, after the non-uniform cross-section rolled steel 4 is placed on the cooling bed 1, the air-cooling mechanism 2 is activated. Gas is sprayed from the jet pipes to force-cool the thicker sections of the rolled steel 4, which are at relatively high temperatures. The thinner sections, which are at relatively low temperatures, are cooled only by air cooling. This ensures that the thicker and thinner sections of the rolled steel 4 cool as evenly as possible, while simultaneously causing contraction and preventing large bending due to uneven temperature distribution. During this process, the bending of the rolled steel 4 is monitored in real time by the monitoring mechanism 3. When lateral bending is detected, the monitoring mechanism 3 immediately adjusts the opening of the control valves 23 on each jet pipe directly opposite the rolled steel 4 to adjust the amount and point of air sprayed onto the rolled steel 4. This allows for real-time dynamic adjustment of the lateral bending of the rolled steel 4 on the cooling bed 1, ultimately resulting in a relatively straight non-uniform cross-section rolled steel 4 product. The amount of air spray is adjusted by the degree of opening of the control valves 23, and the jet point adjustment is achieved by closing some control valves 23 to cut off the corresponding jet pipe.
[0030] The device provided by this invention for preventing the bending of unevenly cut rolled steel 4 on the cooling bed 1 is installed on the cooling bed 1. It makes full use of the advantage that the air cooling time on the cooling bed 1 is long enough and the deformation of the rolled steel 4 is slow. On the basis of air cooling, an air cooling mechanism 2 is set up to force air cooling on the thick section of the rolled steel 4 with higher temperature, so that the temperature of the thick section and the thin section of the rolled steel 4 tends to be consistent, thereby preventing the rolled steel 4 from bending greatly due to uneven temperature distribution. At the same time, a detection mechanism is set up to monitor the bending of the rolled steel 4 in real time and control the opening of the control valve 23 on the jet pipe accordingly, so as to control the amount of bending of the unevenly cut rolled steel 4 on the cooling bed 1 in real time, thereby obtaining a relatively straight unevenly cut rolled steel 4 product.
[0031] According to one embodiment of the present invention, when the monitoring mechanism 3 detects that the rolled steel 4 is bent, the monitoring mechanism 3 controls to reduce the opening of the control valve 23 on the jet pipe facing the bending direction and increases the opening of the control valve 23 on the jet pipe facing the reverse bending direction. Specifically, when the rolled steel 4 is bent, it indicates that the temperature distribution on the inner and outer sides of the bent side is uneven, and the inner side cools down faster than the outer side, causing the rolled steel 4 to bend towards the side that cools down faster. At this time, by adjusting the opening of the control valve 23 on the jet pipes on both sides of the bend in the opposite direction, that is, reducing the opening of the control valve 23 on the jet pipe on the inner side of the bend to accelerate the cooling of the inner side of the bend, and increasing the opening of the control valve 23 on the jet pipe on the outer side of the bend to slow down the cooling of the outer side of the bend, the bent part spontaneously bends in the opposite direction based on the principle of thermal expansion and contraction. After the bend is eliminated, the monitoring mechanism 3 controls the control valve 23 on each jet pipe to return to the initial opening, and so on, until the rolled steel 4 cools down to the preset temperature. The control valve 23, which controls the opening of the monitoring mechanism 3, is located on the jet pipe at the downstream end of the rolling mill 4 in the direction of running on the cooling bed 1. In this embodiment, the initial opening of the control valve 23 on each jet pipe is an opening that will not cause the rolling mill 4 to bend laterally during the commissioning test. For rolling mills 4 with different specifications and sizes and uneven cross sections, the initial opening of the control valve 23 on each jet pipe will also be different.
[0032] According to a preferred embodiment of the present invention, the length direction of the rolled steel 4 is the same as its running direction on the cooling bed 1. The air cooling mechanism 2 includes multiple rows of pipe groups arranged side by side along the width direction of the rolled steel 4. Each row of pipe groups includes multiple air jet pipes spaced apart along the running direction of the rolled steel 4 on the cooling bed 1. This ensures that the air jet points can cover the cross-section of the thick section of the rolled steel 4, achieving uniform cooling of the entire non-uniform cross-section rolled steel 4.
[0033] According to a preferred embodiment of the present invention, the rolled steel 4 is placed on the cooling bed 1 via a toothed straightening plate 5, the toothed straightening plate 5 having air holes communicating with the nozzles of an air jet pipe. Specifically, as shown... Figure 2As shown, the rolled steel 4 is placed on the cooling bed 1 by the toothed straightening plate 5, which facilitates the stable placement of the rolled steel 4 with uneven cross section, and at the same time helps to maintain the static state of the rolled steel 4, so as to make it easier to find the air jet point, facilitate air jet cooling and bending control. By directly opening air holes on the toothed straightening plate 5 that are connected to the nozzle of the air jet pipe, it is possible to avoid the air jet pipe interfering with the operation of the rolled steel 4, and also to avoid the air jet pipe interfering with the monitoring mechanism 3's monitoring of the bending amount of the rolled steel 4.
[0034] According to a preferred embodiment of the present invention, the rolled steel 4 is a bulb flat steel, and the jetting conduit includes a first jetting conduit 21 and a second jetting conduit 22. The nozzle of the first jetting conduit 21 is disposed facing the inner side of the bulb head of the bulb flat steel, and the nozzle of the second jetting conduit 22 is disposed facing the outer side of the bulb head of the bulb flat steel. Specifically, the non-uniform cross-section rolled steel 4 includes bulb flat steel, L-shaped steel, etc. Figure 2 As shown, in this embodiment, the non-uniform cross-section rolled steel 4 is preferably a bulb flat steel. The bulb flat steel includes two parts: a bulb head with a thick cross-section and a web with a thin end face. Air jet pipes are provided on both the inner and outer sides of the bulb head. Specifically, there are a first air jet pipe 21 with the nozzle facing the inner side of the bulb head and a second air jet pipe 22 with the nozzle facing the outer side of the bulb head. By providing air jet pipes on both sides of the bulb head with higher temperature, air jet cooling is performed on the inner and outer sides of the bulb head to ensure uniform cooling on the inner and outer sides of the bulb head and avoid unilateral bending deformation of the bulb head.
[0035] According to a preferred embodiment of the present invention, the monitoring mechanism 3 includes a monitor and a controller. The controller is electrically connected to both the monitor and the control valve 23. The monitor is used to acquire the bending status signal of the rolled steel 4, and the controller is used to receive the bending status signal of the rolled steel 4 and correspondingly control the opening degree of the control valve 23 on each jet pipe. Thus, the controller controls the opening degree of the control valve 23 on each jet pipe according to the bending signal of the rolled steel 4 detected and fed back by the monitor, thereby realizing real-time signal transmission and real-time adjustment of the bending of the rolled steel 4.
[0036] According to a preferred embodiment of the present invention, the monitor includes a plurality of cameras 31 arranged at intervals, which can provide full coverage monitoring of the steel rolling mill 4. Specifically, as shown... Figure 2 As shown, the monitor includes multiple cameras 31 spaced apart along the running direction of the rolled piece, so as to fully monitor the cooling process of the rolled steel 4 running on the cooling bed 1, thereby controlling the amount of bending of the uneven cross section rolled steel 4 on the cooling bed 1 in real time, and ensuring that the relatively straight uneven cross section rolled steel 4 product is finally obtained.
[0037] According to a preferred embodiment of the present invention, the air-cooling mechanism 2 further includes an air compressor, which is connected to multiple jet pipes via a main duct. Specifically, the air-cooling mechanism 2 further includes an air compressor that provides a cooling source for the multiple jet pipes.
[0038] Another objective of this invention is to provide a method for preventing the bending of the unevenly cut rolled steel 4 on the cooling bed 1 using the aforementioned device for preventing bending of the unevenly cut rolled steel 4 on the cooling bed 1. The method includes: after the rolled steel 4 is placed on the cooling bed 1, the control valve 23 is opened by the monitoring mechanism 3 to open the jet pipe and perform jet cooling on the thick section of the rolled steel 4; during the jet cooling process, when the monitoring mechanism 3 detects that the rolled steel 4 is bent, the opening degree of the control valve 23 on the jet pipe with the nozzle facing the bending direction is reduced by the monitoring mechanism 3, and the opening degree of the control valve 23 on the jet pipe with the nozzle facing the opposite bending direction is increased by the monitoring mechanism 3 until the rolled steel 4 is reduced to a preset temperature.
[0039] The method for preventing the bending of unevenly cut rolled steel 4 on the cooling bed 1 provided by the present invention controls the bending amount of rolled steel 4 on the cooling bed 1. After being placed on the cooling bed 1, rolled steel 4 is basically in a static state. By rapidly spraying cooling on the thick section of rolled steel 4 in the high temperature region, and by monitoring the side bending caused by unreasonable cooling intensity through the monitoring mechanism 3, the spray volume and spray point are adjusted in time to dynamically adjust the side bending of the rolled piece on the cooling bed 1 in real time. Taking full advantage of the slow running speed of the cooling bed 1, rolled steel 4 can be sprayed and cooled on the cooling bed 1 for a long time until the rolled steel 4 is reduced to a suitable temperature. The cooling time and cooling position are guaranteed, and the cooling effect is better.
[0040] According to a preferred embodiment of the present invention, temperature sensors are installed on both the thick and thin sections of the rolled steel 4. The temperature sensors transmit the detected temperature signals from the thick and thin sections of the rolled steel 4 to the monitoring mechanism 3. The monitoring mechanism 3 controls the opening degree of the control valves 23 on each jet pipe according to the bending condition of the rolled steel 4 and the received temperature signals, thereby ensuring uniform cooling of the thick and thin sections of the rolled steel 4. This further improves the control accuracy of the bending amount of the unevenly cut rolled steel 4 during the cooling process on the cooling bed 1.
[0041] Based on the above description, the device for preventing the bending of the unevenly cut rolled steel 4 on the cooling bed 1 provided in this application is installed on the cooling bed 1. It fully utilizes the advantage that the air cooling time on the cooling bed 1 is long enough and the deformation of the rolled steel 4 is slow. In addition to air cooling, an air cooling mechanism 2 is set up to force air cooling on the thick section of the rolled steel 4 with higher temperature, so that the temperature of the thick and thin sections of the rolled steel 4 tends to be consistent, thereby preventing the rolled steel 4 from bending due to uneven temperature distribution. At the same time, a detection mechanism is set up to monitor the bending of the rolled steel 4 in real time and correspondingly control the opening of the control valve 23 on the jet pipe. The bending amount of the non-uniform cross-section rolled steel 4 on the cooling bed 1 is controlled in real time to obtain a relatively straight non-uniform cross-section rolled steel 4 product. The rolled steel 4 is placed on the cooling bed 1 through the toothed straightening plate 5 to facilitate the stable placement of the non-uniform cross-section rolled steel 4 and to help maintain the static state of the rolled steel 4, so as to facilitate the accurate location of the air jet point, facilitate air jet cooling and bending control. Furthermore, by directly opening air holes on the toothed straightening plate 5 that are connected to the nozzle of the air jet pipe, it is not only avoided that the air jet pipe interferes with the operation of the rolled steel 4, but also avoids the air jet pipe interfering with the monitoring mechanism 3's monitoring of the bending amount of the rolled steel 4.
[0042] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention.
Claims
1. An apparatus for preventing the bending of a non-uniform cross-section steel on a cooling bed, characterized in that, include: The air-cooling mechanism has multiple air jet pipes, which are spaced apart along the running direction of the rolled steel on the cooling bed. The nozzles of the air jet pipes are directed toward the thick section of the rolled steel. Air jet pipes are provided on both the inner and outer sides of the thick section of the rolled steel, and control valves are provided on the air jet pipes. The monitoring mechanism is positioned above the cooling bed, directly opposite the rolled steel. The monitoring mechanism is electrically connected to the control valve, and can control the opening degree of the control valve on each jet pipe according to the bending condition of the rolled steel.
2. The apparatus for preventing the bending of the uneven section steel on the cold bed according to claim 1, wherein, When the monitoring mechanism detects that the rolled steel is bent, the monitoring mechanism controls to reduce the opening of the control valve on the jet pipe with the nozzle facing the direction of bending, and controls to increase the opening of the control valve on the jet pipe with the nozzle facing the direction of reverse bending.
3. The apparatus for preventing the bending of the uneven section steel on the cold bed according to claim 1, wherein The length direction of the rolled steel is the same as its running direction on the cooling bed. The air cooling mechanism includes multiple rows of pipe groups arranged side by side along the width direction of the rolled steel. Each row of pipe groups includes multiple jet pipes spaced apart along the running direction of the rolled steel on the cooling bed.
4. The device for preventing bending of unevenly rolled steel on a cooling bed according to claim 3, characterized in that, The rolled steel is placed on the cooling bed via a toothed straightening plate, and the toothed straightening plate has air holes that communicate with the nozzle of the jet pipe.
5. The device for preventing bending of unevenly rolled steel on a cooling bed according to claim 4, characterized in that, The rolled steel is a bulb flat steel, and the jet pipe includes a first jet pipe and a second jet pipe. The nozzle of the first jet pipe is arranged facing the inner side of the bulb head of the bulb flat steel, and the nozzle of the second jet pipe is arranged facing the outer side of the bulb head of the bulb flat steel.
6. The apparatus for preventing the bending of the uneven section steel on the cold bed according to claim 1, wherein The monitoring mechanism includes a monitor and a controller. The controller is electrically connected to both the monitor and the control valve. The monitor is used to acquire the bending signal of the rolled steel, and the controller is used to receive the bending signal of the rolled steel and correspondingly control the opening degree of the control valve on each of the jet pipes.
7. The device for preventing bending of unevenly rolled steel on a cooling bed according to claim 6, characterized in that, The monitor includes multiple cameras spaced apart, which can provide full coverage monitoring of the rolled steel.
8. The device for preventing bending of unevenly rolled steel on a cooling bed according to claim 1, characterized in that, The air-cooling mechanism also includes an air compressor, which is connected to multiple jet pipes via a main pipe.
9. A method for preventing bending of rolled steel with uneven cross-section on a cooling bed using the device for preventing bending of rolled steel with uneven cross-section on a cooling bed as described in any one of claims 1 to 8, characterized in that, include: After the rolled steel is placed on the cooling bed, the control valve is opened by the monitoring mechanism to open the jet pipe and perform jet cooling on the thick section of the rolled steel. During the jet cooling process, when the monitoring mechanism detects that the rolled steel is bent, it controls the opening of the control valve on the jet pipe with the nozzle facing the direction of bending to be reduced, and controls the opening of the control valve on the jet pipe with the nozzle facing the direction of reverse bending to be increased, until the rolled steel is reduced to the preset temperature.
10. The method of claim 9, wherein the method further comprises the step of: Temperature sensors are installed on both the thick and thin sections of the rolled steel. The temperature sensors transmit the detected temperature signals of the thick and thin sections of the rolled steel to the monitoring mechanism. The monitoring mechanism controls the opening of the control valves on each jet pipe according to the bending of the rolled steel and the received temperature signals, so that the thick and thin sections of the rolled steel are cooled evenly.