Troubleshooting device and method for continuous casting and rolling production lines

Abstract

This invention belongs to the field of metal rolling technology and relates to a fault handling device and method for continuous casting and rolling production lines. A swing shear and fault handling device are installed between the roughing mill and the finishing mill. The fault handling device consists of a roller shear and a fault roller conveyor, with a moving roller on the fault roller conveyor. The moving roller and a fixed roller form a clamping device. A second pinch roller is provided between the roller shear and the fault roller conveyor. A method for handling faults in a continuous casting and rolling production line using this device is also provided. In continuous casting and rolling production lines, especially in endless rolling production, this invention can buffer the production line between the roughing mill and the finishing mill when a production accident occurs downstream of the fault handling device, such as steel jamming or steel piling. It effectively handles production line faults without stopping the continuous casting machine, preventing further aggravation of accident losses and equipment damage, thereby reducing economic losses.

Description

Technical Field

[0001] This invention belongs to the field of metal rolling technology and relates to a fault handling device and method for continuous casting and rolling production lines. Background Technology

[0002] The short-process continuous casting and rolling technology, successfully developed in the late 1980s, is another revolutionary technological achievement in the iron and steel metallurgy field, following converter steelmaking and fully continuous casting technologies, leading the way in steel manufacturing technology. This technology organically combines thin-gauge billet continuous casting with hot continuous rolling, representing a major breakthrough in near-net-shape manufacturing technology. In traditional steel production, each stage is relatively independent, limiting improvements in production efficiency and product quality. The emergence of short-process continuous casting and rolling technology breaks this pattern, closely linking continuous casting and rolling, bringing a completely new model to steel production. Short-process continuous casting and rolling production technology is of great significance for building an energy-saving and environmentally friendly society. From an energy-saving perspective, it reduces intermediate heating stages, lowering energy consumption; from an environmental perspective, it reduces emissions of pollutants such as waste gas and wastewater.

[0003] Compared to traditional hot continuous rolling, short-process continuous casting and rolling technology offers significant advantages, particularly in the production of thin-gauge strip. Traditional hot continuous rolling faces numerous challenges in producing thin-gauge strip, while short-process continuous casting and rolling technology effectively solves this problem through its unique endless or semi-endless production process. In conventional hot continuous rolling, the strip threading process during single-strip rolling has the highest failure rate, severely impacting production stability and product quality. The endless or semi-endless production process of short-process continuous casting and rolling technology avoids this high-failure-rate stage, significantly improving rolling stability compared to conventional hot continuous rolling. This enables the stable production of thin-gauge strip that is difficult to achieve with traditional hot continuous rolling, meeting market demand for high-end steel products.

[0004] However, short-process continuous casting and rolling technology also presents certain challenges. While its rigid connection from continuous casting to steel coil significantly improves production stability, it also increases the difficulty of handling production line malfunctions. If an accident occurs in the downstream production stage, and the tundish and continuous casting machine stop working, it will cause huge losses. Therefore, to ensure the continuity and stability of production and reduce losses, it is necessary to study a device and method that can ensure the continuous casting section is unaffected by downstream accidents and achieve continuous production. This is also the technical problem that this application urgently needs to solve. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a fault handling device and method for a continuous casting and rolling production line to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for handling faults in a continuous casting and rolling production line is arranged between the roughing mill and the finishing mill of the continuous casting and rolling production line. The device includes a swing shear and a fault handling device. The fault handling device includes a roller shear and a fault roller table. The fault roller table includes at least one moving roller and a fixed roller. When a fault occurs, the moving roller moves to form a clamping device with the fixed roller. The clamping device is used to clamp the slab and adjust its opening angle and conveying speed to achieve buffering between the roughing mill and the finishing mill and avoid downtime of the upstream continuous casting machine.

[0007] Furthermore, the clamping angle, conveying speed, and clamping force of the clamping device are determined based on the thickness, temperature, and inlet speed of the clamped slab to ensure that the slab forms a suspended sleeve in the event of a fault, thus avoiding damage to the steel.

[0008] Furthermore, a second pinch roller is provided between the drum shear and the faulty roller conveyor. The second pinch roller is used to fix the slab during the drum shearing process and, after shearing, cooperates with the clamping device to transport the tail of the steel coil segment so as to separate it from the slab segment.

[0009] Furthermore, a storage device is provided below the faulty roller conveyor to receive broken blanks generated by the roller shear. The storage device is equipped with a visual inspection device to detect the state of waste material accumulation in the storage device during fault handling.

[0010] Furthermore, the second pinch roller is also used to adjust the orientation of the head of the sheared slab. The orientation of the head of the sheared slab is adjusted by controlling the asynchronous speed of the upper and lower rollers, so as to guide the broken slab to fall towards the storage device.

[0011] Furthermore, the inlet of the clamping device is equipped with a monitoring system for real-time monitoring of the thickness, temperature and speed of the slab, and transmitting the monitoring data to the control system to realize dynamic parameter adjustment of the clamping device.

[0012] Furthermore, the moving roller is equipped with a fault monitoring module, which periodically collects and analyzes the status parameters of the equipment during operation, uses an AI early warning model to identify the deterioration of equipment performance and early signs of failure, and issues an early warning signal.

[0013] Furthermore, the movable roller is arranged below the slab, the fixed roller is arranged above the slab, and the fixed roller is located on the side of the movable roller closer to the drum shear, so that the clamping device forms an elevation angle toward the side away from the drum shear.

[0014] On the other hand, the present invention also provides a method for troubleshooting a continuous casting and rolling production line, using the aforementioned apparatus; When a downstream failure occurs, the method includes the following steps: 1) The moving roller moves and forms a clamping device with the fixed roller. The clamping device clamps the conveying slab at a set angle, causing it to continuously rise and move away from other roller surfaces, thus forming a suspended state. 2) The roller shear cuts the continuous slab into billet segments and steel coil segments to isolate the fault area.

[0015] Furthermore, while starting the clamping device, the comparison between the slab speed at the exit of the roughing mill and the shearing speed of the swing shear determines whether to start the swing shear immediately. If the speeds are mismatched, the roll gap of the roughing mill is opened to reduce the slab speed until the shearing conditions are met.

[0016] Furthermore, after the slab is cut into billet segments and steel coil segments, the tail end of the steel coil segment is transported at an accelerated speed by a second pinch roller and a clamping device to separate it from the billet segment; the speed of the clamping device is set to be greater than that of the second pinch roller to ensure the separation distance.

[0017] Furthermore, before the swing shear is started, the head of the billet section is successively broken and sheared into short billets by the roller shear; The billet section is then cut into two parts by a swing shear, and the downstream part is accelerated to break up, with the broken billet falling into the storage device.

[0018] Furthermore, during the crushing process, the second pinch roller adjusts the orientation of the head of the crushed billet by the speed difference between the upper and lower rollers, causing it to be thrown obliquely downward toward the storage device; The upstream billet section is continuously fed, and the billet is removed from the line after being cut to length by a swing shear.

[0019] Furthermore, after the fault is resolved, the swing shearing is stopped, the moving roller is reset, and the head of the remaining billet section passes through the swing shear, the roller shear, and the faulty roller conveyor in sequence to restore the normal production process.

[0020] Furthermore, the inlet of the clamping device is equipped with a sensor for real-time monitoring of the thickness, temperature and speed of the slab, and the monitoring data is transmitted to the control system to realize dynamic parameter adjustment of the clamping device; The moving roller is equipped with a fault monitoring module, which monitors data in real time and provides early warnings of anomalies to ensure the safety of the fault handling process.

[0021] The beneficial effects of this invention are as follows: 1. This invention provides a fault handling device and method for a continuous casting and rolling production line. The device achieves dynamic clamping of the slab and adjustment of the sleeve angle by setting up a swing shear, roller shear, and fault roller table between the roughing and finishing mills, and utilizing a clamping device formed by moving and fixed rollers. This design is particularly suitable for endless rolling production. When a steel jam or pile-up occurs downstream, it can quickly form a suspended buffer zone, isolating the rigid connection between the upstream continuous casting machine and the downstream rolling mill, ensuring that the continuously produced slab does not directly impact the fault point, and reducing losses caused by the accident.

[0022] 2. During the fault handling process, this method adjusts the slab shape through the clamping device to form a buffer zone, the drum shear cuts the slab, and the speed of the tail of the steel coil is adjusted by the second pinch roller to accelerate the separation, further enhancing the buffering effect; during the crushing shearing process of the drum shear, the length of the crushed billet is precisely controlled, and combined with the asynchronous control of the second pinch roller, so that the crushed material falls accurately into the storage device, and the waste is removed from the rolling line through the storage device. The fault handling process is highly operable, with low manual labor intensity and a friendly working environment.

[0023] 3. Since the fault handling device is not in operation during normal production, it is impossible to know whether the equipment is in good condition. If equipment damage is only discovered when the production line malfunctions and is put into use, fault handling will not be able to proceed smoothly. This invention incorporates a fault monitoring and early warning module in the clamping device, a visual monitoring device in the material storage device, and a monitoring system at the clamping device inlet. These monitoring systems and early warning modules ensure that the status of the fault handling device is knowable and controllable. Furthermore, AI-based early warning systems can identify early signs of equipment performance degradation and malfunctions, and issue warning signals accordingly.

[0024] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a fault handling device for a continuous casting and rolling production line according to the present invention. Figure 2 This is a schematic diagram of the operation of a fault handling device for a continuous casting and rolling production line according to the present invention. Figure 1 ; Figure 3This is a schematic diagram of the operation of a fault handling device for a continuous casting and rolling production line according to the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the operation of a fault handling device for a continuous casting and rolling production line according to the present invention. Figure 3 .

[0026] Figure reference numerals: 1. Swing shear; 2. Roller shear; 3. Faulty roller conveyor; 301. Moving roller; 302. Fixed roller; 30. Clamping device; 4. Billet section; 5. Steel coil section; 6. First clamping roller; 7. Second clamping roller; 8. Material storage mechanism. Detailed Implementation

[0027] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] Please see Figure 1 This is a fault handling device for a continuous casting and rolling production line. The fault handling device includes a swing shear 1, a roller shear 2 and a fault roller conveyor 3. The swing shear 1 is used to cut the first and last billets of the casting according to production requirements, cut in special production modes, and cut the slabs as required in fault conditions. The roller shear 2 is used for shearing in special production modes, and for shearing slabs as required in case of failure. The faulty roller conveyor 3 is used to transport slabs during production. When the production line malfunctions, it works in conjunction with the roller shear 2 to handle the malfunction. When a malfunction occurs in the production line, the moving roller 301 in the faulty roller conveyor 3 moves to form a clamping device with the fixed roller 302 on the other side of the slab to adjust the speed, orientation, or stress of the slab being clamped.

[0031] A fixed roller 302 is provided on the other side of the moving roller 301 opposite to the slab, so that the fixed roller 302 and the moving roller 301 form a strip clamping device 30.

[0032] A second pinch roller 7 is provided between the drum shear 2 and the faulty roller conveyor 3. The second pinch roller 7 has the following functions: Used to clamp and hold the slab to be cut by the roller shears; Used in conjunction with the clamping device to transport the tail end of the steel coil segment 5; Used to adjust the head position of the slab sheared by the roller.

[0033] The second pinch roller 7 adjusts the orientation of the head of the clamped slab by controlling the asynchronous speed of the upper and lower rollers to guide the broken slab to fall toward the storage device 8.

[0034] Below the faulty roller conveyor 3 is a storage device 8, which is used to store the blanks cut by the roller shear 3 during fault handling; above the storage device 8 is a visual inspection device, which is used to detect the state of waste material accumulation in the storage device during fault handling.

[0035] The inlet of the roller shear 2 is provided with a first clamping roller 6, which, together with the second clamping roller 7, clamps the sheared slab.

[0036] The faulty roller conveyor 3 is provided with multiple rollers, including at least one movable roller 301, and the remaining rollers are non-movable rollers. The movable roller 301 is not set as the first roller along the conveying direction.

[0037] Specifically, the moving roller 301 is arranged below the slab, the fixed roller 302 is arranged above the slab, and the fixed roller 302 is located on the side of the moving roller 301 closer to the drum shear 2, so that the clamping device forms an elevation angle toward the side away from the drum shear 2.

[0038] This invention also proposes a method for troubleshooting a continuous casting and rolling production line. This method employs the aforementioned device for troubleshooting a continuous casting and rolling production line. When a fault occurs in the continuous casting and rolling production line and the troubleshooting device needs to be activated, the troubleshooting method includes the following steps: S1: Perform the following steps simultaneously. S1-A: Start the roller shear 2 cutting program. S1-B: Initiate the movement of the movable roller 301, causing it to form a clamping device with another roller. This clamping device holds the slab within its channel, allowing the slab to continuously move away from the roller surfaces of other immovable rollers in the faulty roller conveyor 3. S1-C: Based on the relationship between the slab speed at the exit of the roughing mill and the shearing speed of the oscillating shear 1, determine whether the oscillating shear 1 should start the shearing program immediately or start the shearing program after the conditions are met.

[0039] S2: The roller shear 2 performs shearing, cutting the continuously produced slabs into billet segments 4 and steel coil segments 5; S2A: Before the swing shear 1 performs the shearing, the head of the billet section 4 in step S2 is successively sheared into short billets by the roller shear 2. The length of the short billet is set as the length of the billet that can pass between the second pinch roller 7 and the first roller of the fault roller 3 when the asynchronous speed control of the second pinch roller 7 is at its limit. S3: Cut the billet section 4 into two parts using swing shear 1; S4: Use roller shear 2 to cut the upstream and downstream parts of the billet section 4 into short billets multiple times. The length of the short billets is controlled in the same way as in step S2A. S5: The upstream part of the billet section 4 is continuously fed and removed from the line by shearing with swing shear 1; S6: After the fault is resolved, the swing shear 1 stops shearing, and the head of the billet section 4 passes through the swing shear 1, the roller shear 2 and the faulty roller conveyor 3 in turn to reach the subsequent process and start normal production.

[0040] A fixed roller 302 is provided on the other side of the moving roller 301 opposite to the slab, so that the fixed roller 302 and the moving roller 301 form a strip clamping device. The clamping device can adjust the speed, orientation or stress of the slab on the exit side.

[0041] A second pinch roller 7 is provided between the drum shear 2 and the faulty roller conveyor 3. The second pinch roller 7 has the following functions. During steps S2 and S4, the slab is clamped and fixed during the shearing process of the roller shear 2. After step S2, the pinch roller 7 and the clamping device 30 work together to clamp the tail of the transported steel coil segment 5, so that it is separated from the billet segment 4. Each time the drum shear 2 cuts (excluding when S2 is completed), the speed difference between the contact points of the upper and lower rollers in the second pinch roller 7 with the slab is used to adjust the head travel position of the slab cut by the drum shear.

[0042] The orientation of the head of the slab held by the second pinch roller 7 can be adjusted by controlling the asynchronous speed of the upper and lower rollers.

[0043] A storage device 8 is provided below the faulty roller conveyor 3 to store the blanks cut by the roller shear 3 during fault handling.

[0044] While performing step S1, the roll gap of the roughing mill unit before the swing shear 1 is opened to reduce the slab speed at the exit of the roughing mill unit so that it can match the shearing speed of the swing shear 1 as soon as possible.

[0045] Furthermore, the moving roller 301 is equipped with a fault monitoring module, which periodically collects and analyzes the status parameters of the equipment during operation, uses an AI early warning model to identify the deterioration of equipment performance and early signs of faults, and issues an early warning signal.

[0046] The inlet of the clamping device 30 is equipped with a monitoring system (specifically, a sensor) to monitor the thickness, temperature, and speed of the slab in real time, and transmit the monitoring data to the control system. The control system then adjusts the clamping angle, conveying speed, and clamping force of the clamping device to achieve dynamic parameter adjustment. The clamping angle, conveying speed, and clamping force of the clamping device 30 are determined based on the thickness, temperature, and inlet speed of the clamped slab to ensure that the slab forms a suspended sleeve in case of failure, thus avoiding damage from steel stacking.

[0047] This invention provides a fault handling device and method for continuous casting and rolling production lines. The device achieves dynamic clamping of slabs and adjustment of the sleeve opening angle by installing a swing shear, roller shear, and fault conveyor between the roughing and finishing mills, and utilizing a clamping device formed by moving and fixed rollers. This design is particularly suitable for endless rolling production. When a steel jam or pile-up occurs downstream, it can quickly form a suspended buffer zone, isolating the rigid connection between the upstream continuous casting machine and the downstream rolling mill, ensuring that the continuously produced slabs do not directly impact the fault point, and reducing losses caused by the accident.

[0048] During the fault handling process, this method adjusts the shape of the slab to form a buffer zone through the clamping device, the roller shear cuts the slab, and the speed of the tail of the steel coil is adjusted by the second pinch roller to accelerate the separation, further enhancing the buffering effect. During the crushing and shearing process of the roller shear, the length of the crushed billet is precisely controlled, and combined with the asynchronous control of the second pinch roller, the crushed material is accurately dropped into the storage device. The waste is then removed from the rolling line through the storage device. The fault handling process is highly operable, requires less manual labor, and has a friendly working environment.

[0049] Since the fault handling device is not operational during normal production line operation, it is impossible to know whether the equipment is in good condition. If equipment damage is only discovered when the production line malfunctions and is put into use, fault handling will not be able to proceed smoothly. This invention incorporates a fault monitoring and early warning module in the clamping device, a visual monitoring device in the material storage device, and a monitoring system at the clamping device inlet. These monitoring systems and early warning modules ensure that the status of the fault handling device is knowable and controllable. Furthermore, AI-based early warning systems can identify equipment performance degradation and early signs of failure in advance and issue warning signals.

[0050] Example 1 During continuous casting and rolling production, the casting speed is 5.5 m / min, the billet thickness is 105 mm, the billet width is 1500 mm, the intermediate billet thickness is 9 mm, and the intermediate billet speed is 1.07 m / s. The maximum shearing speed of the swing shear on this production line is designed to be 0.6 m / s, and the roller shear 2 is designed with double blades and a maximum shearing speed of 1.7 m / s. The billet temperature at the continuous casting outlet is 1050℃, and the intermediate billet temperature is 890℃.

[0051] When a steel pile-up accident is detected between the finishing mill stands, an emergency fault signal is issued, and the entire line is activated with a fault handling plan that allows for continuous casting without stopping rolling, based on the corresponding fault area and type.

[0052] After a fault signal is given, the following three procedures will be executed simultaneously: 1) The roller shear 2 starts immediately, but it takes 1.6 seconds from start to cut. During this time, the intermediate billet will continue to be conveyed downstream. However, since the finishing rolling area can no longer consume the upstream material, the continuously conveyed intermediate billet will form a loop of 1.7m in a certain area. This loop will be formed between the faulty roller conveyor 3 areas by guidance. 2) The system determines that the intermediate billet speed does not meet the requirements of the swing shear 1 shearing and needs to raise the roughing mill roll gap to reduce the intermediate billet speed. After 2 seconds, the intermediate billet speed drops to meet the requirements of the swing shear shearing and then the swing shear 1 shearing is performed. The roughing mill roll gap is opened sequentially from the exit to the entrance. 3) In addition, the insulation cover (arranged on the faulty roller conveyor to keep warm during normal production) will be lifted at the same time, and the moving roller 301 will be lifted to form a clamping device 30 with the fixed roller 302 (the output tilt angle of the clamping slab is adjusted by the contact point between the moving roller and the fixed roller). Its clamping force (the torque per unit width of the clamping roller is 8kNm) will clamp the intermediate slab to continuously leave the other immovable roller surfaces of the faulty roller conveyor, thereby forming a suspended slab. The first pinch roller 6 at the inlet of the drum shear 2 and the second pinch roller 7 at the outlet of the drum shear 2 form a clamping force, which together with the clamping device transports the strip steel.

[0053] After the roller shear 2 performs the first cut, the second pinch roller 7 and the clamping device accelerate their operation, clamping the downstream tail section and disengaging it from the upstream head section.

[0054] When the tail of the downstream intermediate billet is 100mm away from the center line of the clamping device 30, the clamping device 30 stops rotating so as to control the folding shape of the downstream intermediate billet.

[0055] Before the shearing is performed by the swing shear 1, the head of the billet section 4 is continuously cut into short billets by the roller shear 2.

[0056] After the downstream strip tail cut by the first cut of the roller shear 2 leaves the second pinch roll 7, the second pinch roll 7 decelerates to the original intermediate billet running speed and then moves at a constant speed to ensure that the second cut shearing speed matches the strip speed.

[0057] After the drum shear 2 makes the second cut, the second pinch roller 7 increases its speed, causing the cut material to separate from the upstream material. To ensure that the broken material can be smoothly thrown diagonally downwards, the upper roller speed of the second pinch roller 7 is 5% faster than the lower roller speed of #2. This speed difference ratio remains unchanged for subsequent breaking operations.

[0058] When the speed of the intermediate billet drops to the shearing speed range of the swing shear 1, the swing shear 1 makes the first cut. After the shearing is completed, the conveyor roller (arranged between the swing shear 1 and the drum shear 2) drives the intermediate billet to accelerate and separate from the upstream billet. The conveyor roller has the function of conveying along the production line direction and conveying perpendicular to the production line direction.

[0059] The roller shear 2 adjusts its speed to match the speed of the intermediate billet and performs fragmentation shearing until the waste material in that section is fragmented.

[0060] The continuously cast billets continuously output by the continuous casting machine are cut to length by the swing shear and then moved out of the rolling line in the conveyor roller section.

[0061] The strip downstream of the fault handling device 3 is removed from the rolling line by manual handling according to the actual working conditions.

[0062] Example 2 When the continuous casting and rolling production line is in operation, the continuous casting speed is 4.5 m / min, the billet thickness is 105 mm, the billet width is 1250 mm, the intermediate billet thickness is 20 mm, and the intermediate billet speed is 0.39 m / s. The maximum shearing speed of the swing shear on this production line is designed to be 0.6 m / s, and the maximum shearing speed of the roller shear 2 (double blade) is designed to be 1.7 m / s. The billet temperature at the continuous casting outlet is 1030℃, and the intermediate billet temperature is 880℃. In the event of a failure in the coiler switching system, and if the failure can be resolved quickly, the contingency plan for stopping rolling but not casting will be activated for the entire line.

[0063] After a fault signal is given, the following three procedures will be executed simultaneously: 1) The roller shear 2 starts immediately, but it takes 1.6 seconds from start to cut. During this time, the intermediate billet will continue to be conveyed downstream. However, since the finishing rolling area can no longer consume the upstream material, the continuously conveyed intermediate billet will form a loop of 0.7m in a certain area. This loop will be formed between the faulty roller conveyor 3 areas by guidance. 2) The system determines that the intermediate billet speed meets the requirements of the swing shear 1 shearing and immediately starts the swing shear shearing. However, it takes 4 seconds from the start of the swing shear shear to the execution of the shearing. During this period, other synchronous actions are executed first. 3) In addition, the insulation cover will be raised and the moving roller 301 will be raised (first at a low angle and then gradually increasing the angle) to form a clamping device with the fixed roller 302. The clamping force (the clamping roller has a torque of 12kNm per unit width) will clamp the intermediate billet and keep it away from the other immovable roller surfaces of the faulty roller table, thus forming a suspended billet. The first clamping roller 6 at the inlet of the roller shear 2 and the second clamping roller 7 at the outlet of the roller shear 2 will form a clamping force and transport the strip steel together with the clamping device.

[0064] After the roller shear 2 performs the first cut, the second pinch roller 7 and the clamping device accelerate, clamping the downstream tail section and separating it from the upstream head section. When the downstream intermediate billet tail section is 100mm away from the center line of the clamping device, the clamping device stops rotating in order to control the folding shape of the downstream intermediate billet.

[0065] Before the shearing is performed by the swing shear 1, the head of the billet section 4 is continuously cut into short billets by the roller shear 2.

[0066] After the downstream strip tail cut by the first cut of the roller shear 2 leaves the second pinch roll 7, the second pinch roll 7 decelerates to the original intermediate billet running speed and then moves at a constant speed to ensure that the second cut shearing speed matches the strip speed.

[0067] After the drum shear 2 makes the second cut, the second pinch roller 7 increases its speed, causing the cut material to separate from the upstream material. To ensure that the broken material can be smoothly thrown diagonally downwards, the upper roller speed of the second pinch roller 7 is 5% faster than the lower roller speed of #2. This speed difference ratio remains unchanged for subsequent breaking operations.

[0068] After the oscillating shear performs its first cut, the conveyor rollers accelerate the intermediate billet in that section, increasing the distance it needs to separate from the upstream billet. The roughing mill gradually opens the roll gap from the outlet to the inlet. The roller shear 2 adjusts its speed to match the speed of the intermediate billet and performs fragmentation shearing until the waste material in that section is fragmented. The continuously cast billets continuously output by the continuous casting machine are then cut to length by the oscillating shear and removed from the rolling line.

[0069] The strip steel downstream of the fault handling device is removed from the rolling line by manual handling, depending on the actual working conditions.

[0070] Example 3 In this embodiment, since the movable roller does not participate in production during normal operation but is subjected to harsh conditions such as high-temperature baking for extended periods, a fault monitoring module is installed on the bearing housing of the movable roller 301 to prevent unpredictable damage that could affect its use in case of an accident. This module continuously collects and analyzes the status parameters of the equipment during operation (equipment vibration, oil analysis, temperature monitoring, etc.) to identify signs of equipment performance degradation and early failures, setting alarm and shutdown thresholds for key parameters (such as the effective value of vibration velocity). Once the data exceeds the limit, the system will automatically trigger an alarm. The system also includes an AI early warning model, which uses machine learning algorithms (such as deep learning and support vector machines) to train on historical normal and fault data, allowing the algorithm to learn fault patterns on its own.

[0071] Example 4 In this embodiment, based on the survey of the control accuracy of the clamping device formed by the movable roller 301 and the fixed roller 302 on the shape of the billet, it was found that under certain working conditions, the force parameters of the clamping device formed by the movable roller 301 as the active roller and the fixed roller 302 as the driven roller did not meet the requirements. Therefore, the fixed roller 302 was also set as the active roller with a drive device to improve the capacity of the clamping device.

[0072] Example 5 The difference between this embodiment and Embodiment 1 is that a fault monitoring device is installed at the inlet of the clamping device 30, and a visual monitoring device is installed in the storage device. The fault monitoring device includes a vibration sensor, a temperature sensor, and a noise sensor. The data monitored by these sensors are transmitted to the core processing unit. When these monitoring data exceed the limit value, the system will issue an alarm. In addition, the core processing unit is also equipped with an AI early warning model, which uses machine learning to identify signs of equipment performance degradation and early failures in advance and issues early warning signals.

[0073] The visual monitoring device is connected to the centralized control room. When there are large foreign objects or billets in the storage device that exceed the warning line, it will trigger the relevant warning on the screen of the centralized control room to remind the operator to take action.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fault handling device for a continuous casting and rolling production line, characterized in that, The device is arranged between the roughing mill and the finishing mill of the continuous casting and rolling production line. It includes a swing shear (1) and a fault handling device. The fault handling device includes a roller shear (2) and a fault roller table (3). The fault roller table (3) includes at least one moving roller (301) and a fixed roller (302). The moving roller (301) moves to form a clamping device (30) with the fixed roller (302) when a fault occurs. The clamping device (30) is used to clamp the slab and adjust its starting angle and conveying speed to achieve buffering between the roughing mill and the finishing mill and avoid the upstream continuous casting machine from stopping. The clamping angle, conveying speed and clamping force of the clamping device (30) are determined based on the thickness, temperature and inlet speed of the clamped slab to ensure that the slab forms a suspended sleeve in case of failure and avoids steel stacking damage. The moving roller (301) is arranged below the slab, and the fixed roller (302) is arranged above the slab. The fixed roller (302) is located on the side of the moving roller (301) closer to the roller shear (2), so that the clamping device forms an angle of elevation toward the side away from the roller shear (2).

2. The apparatus according to claim 1, characterized in that, A second pinch roller (7) is provided between the roller shear (2) and the faulty roller conveyor (3). The second pinch roller (7) is used to fix the slab during the shearing process of the roller shear (2) and, after shearing, to cooperate with the clamping device (30) to transport the tail of the steel coil segment (5) so that it is separated from the billet segment (4).

3. The apparatus according to claim 2, characterized in that, A storage device (8) is provided below the faulty roller conveyor (3) to receive the broken blanks produced by the roller shear (2). The storage device (8) is equipped with a visual inspection device to detect the state of waste material accumulation in the storage device during fault handling.

4. The apparatus according to claim 3, characterized in that, The second pinch roller (7) is also used to adjust the orientation of the head of the sheared slab. The orientation of the head of the sheared slab is adjusted by controlling the asynchronous speed of the upper and lower rollers, so as to guide the broken slab to fall towards the storage device (8).

5. The apparatus according to claim 1, characterized in that, The clamping device (30) is equipped with a monitoring system at its inlet, which is used to monitor the thickness, temperature and speed of the slab in real time and transmit the monitoring data to the control system to realize the dynamic parameter adjustment of the clamping device.

6. The apparatus according to claim 1, characterized in that, The moving roller (301) is equipped with a fault monitoring module. By periodically collecting and analyzing the status parameters of the equipment during operation, it uses an AI early warning model to identify the deterioration of equipment performance and early signs of faults, and issues an early warning signal.

7. A method for troubleshooting in a continuous casting and rolling production line, characterized in that, The apparatus according to any one of claims 1 to 5 is used; When a downstream failure occurs, the method includes the following steps: 1) The moving roller (301) moves and forms a clamping device with the fixed roller (302). The clamping device clamps the conveying slab at a set angle, causing it to continuously rise and leave other roller surfaces, thus forming a suspended state. 2) The roller shear (2) cuts the continuous slab into billet segments (4) and steel coil segments (5) to isolate the fault area.

8. The method according to claim 7, characterized in that, At the same time as the clamping device is started, the comparison between the slab speed at the exit of the roughing mill and the shearing speed of the swing shear (1) is used to determine whether to start the swing shear (1) immediately. If the speeds are mismatched, the roll gap of the roughing mill is opened to reduce the slab speed until the shearing conditions are met.

9. The method according to claim 7, characterized in that, After the slab is cut into billet segments (4) and steel coil segments (5), the tail of the steel coil segment (5) is accelerated by the second pinch roller (7) and the clamping device (30) to separate it from the billet segment (4); the speed of the clamping device is set to be greater than that of the second pinch roller (7) to ensure the separation distance.

10. The method according to claim 7, characterized in that, Before the swing shear (1) is started, the head of the billet section (4) is successively broken and cut into short billets by the roller shear (2); The billet section (4) is then cut into two parts by a swing shear (1), and the downstream part is accelerated to break up. The broken billet falls into the storage device (8).

11. The method according to claim 10, characterized in that, During the crushing process, the second pinch roller (7) adjusts the orientation of the head of the crushed billet by the speed difference between the upper and lower rollers, so that it is thrown obliquely downward toward the storage device (8). The upstream billet section (4) is continuously fed and then moved out of the line after being cut to length by the swing shear (1).

12. The method according to claim 7, characterized in that, After the fault is resolved, the swing shear (1) is stopped, the moving roller (301) is reset, and the head of the remaining billet section (4) passes through the swing shear (1), the roller shear (2) and the faulty roller conveyor (3) in sequence to restore the normal production process.

13. The method according to claim 7, characterized in that, The inlet of the clamping device (30) is equipped with a sensor for real-time monitoring of the thickness, temperature and speed of the slab, and transmits the monitoring data to the control system to realize dynamic parameter adjustment of the clamping device; The moving roller (301) is equipped with a fault monitoring module, which monitors data in real time and provides early warnings of abnormalities to ensure the safety of the fault handling process.

Images