Troubleshooting equipment and methods 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 a continuous casting and rolling production line. The fault handling device is located between the roughing mill and the finishing mill and includes a swing shear, a conveyor roller table, a drum shear, and an emergency roller table arranged sequentially along the continuous casting billet transmission direction. The emergency roller table is a swing roller table that can swing from the horizontal direction to the lower vertical direction. The drum shear outlet is equipped with a pinch roller, the upper roller of which is a horizontally movable roller used to clamp the continuous casting billet during fault handling and to detect tension during normal production. This invention proposes a new fault handling device for a continuous casting and rolling production line within the existing production line equipment space through flexible equipment layout and process design. The pinch roller at the drum shear outlet can detect tension during normal production and cooperate with the drum shear for shearing in fault conditions, making fault handling operations more convenient and the equipment layout more reasonable.

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] Developed successfully in the late 1980s, short-process continuous casting and rolling technology represents another revolutionary technological breakthrough in the iron and steel metallurgy field, following converter steelmaking and fully continuous casting, and is leading the development direction of steel manufacturing technology. This technology successfully combines thin-gauge slab continuous casting with hot continuous rolling, a key advancement in near-net-shape manufacturing technology. In the process of building an energy-saving and environmentally friendly society, short-process continuous casting and rolling technology has demonstrated significant advantages and plays a crucial driving role. As an important future development trend in iron and steel metallurgy technology, it possesses more prominent characteristics compared to traditional hot continuous rolling, especially its ability to produce thin-gauge strip steel that is difficult to manufacture with traditional hot continuous rolling. This unique advantage stems from its use of a headless or semi-headless production process. In conventional hot continuous rolling, the failure rate during strip threading in single-slab rolling is relatively high, while short-process continuous casting and rolling technology effectively avoids this problem, significantly improving rolling stability.

[0003] Short-process continuous casting and rolling technology significantly improves production stability through a direct, rigid connection between continuous casting and steel coils. However, this characteristic also brings new problems, namely, a significant increase in the difficulty of handling production line failures. During production, if an accident occurs downstream, the tundish and continuous casting machine will stop operating, resulting in huge losses. Therefore, it is necessary to find a way to ensure that the continuous casting section can continue stable production unaffected by downstream accidents. Currently, existing failure handling systems mainly use looper mechanisms, including swing loopers and integral lifting loopers. However, these solutions all have significant drawbacks: the looper needs to lift the high-temperature thin slab to a height of nearly 4 meters, while the slab is inside the looper, and the ground directly below the looper is subsided due to design limitations. This makes it extremely difficult for operators to handle the high-temperature thin slab lifted by the looper, resulting in low work efficiency and an extremely unfriendly working environment. The high-temperature working environment poses a potential threat to the health of operators, and prolonged exposure may lead to safety accidents. At the same time, inefficient failure handling methods also affect the overall operating efficiency of the production line and increase production costs.

[0004] In summary, existing fault handling technologies for short-process continuous casting and rolling production lines cannot meet actual production needs. There is an urgent need to develop a new fault handling method and equipment for continuous casting and rolling production lines. This new method and equipment should not only enable online fault handling for continuous casting and rolling production lines but also offer advantages such as ease of operation and a friendly working environment. This would improve production efficiency, ensure production safety, and promote the sustainable development of the steel industry. 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 fault handling device for a continuous casting and rolling production line, wherein a continuous casting machine, a roughing mill, a finishing mill and downstream equipment are arranged sequentially along the continuous casting billet transmission direction. The fault handling device is set between the roughing mill and the finishing mill and includes a swing shear, a conveyor roller table, a drum shear and an emergency roller table arranged sequentially along the continuous casting billet transmission direction. The fault roller conveyor is an oscillating roller conveyor that can swing from the horizontal direction to the lower vertical direction; the outlet of the drum shear is equipped with a pinch roller, the upper roller of which is a roller that can move in the horizontal direction, used to clamp the continuous casting billet during fault handling and to detect tension during normal production.

[0007] Furthermore, a hopper is provided below the fault handling equipment area for storing accidental metal strips; the hopper is equipped with a visual inspection device for detecting the state of waste material accumulation in the hopper during fault handling.

[0008] Furthermore, a chute is provided above the accident roller conveyor to guide the billet cut by the roller shear into the hopper; the chute above the accident roller conveyor and the accident roller conveyor form a conveying channel for the continuous casting billet.

[0009] Furthermore, both the accident roller conveyor and the upper roller of the pinch roller are equipped with a fault monitoring module. By periodically collecting and analyzing the status parameters of the equipment during operation, an AI early warning model is used to identify the deterioration of equipment performance and early signs of failure, and to issue an early warning signal.

[0010] Furthermore, the upper roller of the pinch roller is equipped with a tension detection element, and the tension detection data is transmitted to the production control system, and the system model is corrected for actual tension.

[0011] On the other hand, the present invention also provides a fault handling method for a continuous casting and rolling production line, and provides the aforementioned fault handling equipment; The fault handling method includes the following steps: S1: The accident roller conveyor is adjusted from the horizontal direction to the downward vertical direction; S2: The execution order of the following two steps can be switched: S2A: The roller shear cuts the continuous casting billet into a front casting billet section and a rear steel coil section; S2B: The swing shear cuts the continuously cast billet, which is divided into the upstream part of the billet and the downstream part of the billet. S3: The head of the rear steel coil section after being sheared by the roller shear falls into the hopper located below the fault handling equipment area under the action of gravity; S4: The roller shear performs multiple shearing operations on the continuously cast billet fed from the upstream, and the sheared material falls into the hopper; S5: The swing shear cuts the continuously fed continuous casting billet in the continuous casting section, and the cut material is removed from the line through the conveyor rollers; S6: After the fault is resolved, the faulty roller conveyor is adjusted from the vertical direction to the horizontal direction.

[0012] Furthermore, before the roller shearing begins, the upper roller in the pinch rollers on its exit side moves horizontally from the rear swing position to the front swing position. After performing step S6, once the re-produced continuous casting billet is successfully threaded and tension is established, the upper roller in the pinch rollers on the exit side of the drum shear moves horizontally from the front swing position to the rear swing position. The rear swing position is behind the lower roller of the pinch roller, and the front swing position is above the lower roller.

[0013] Furthermore, simultaneously with step S1, the roll gap of the roughing mill before the shearing is opened.

[0014] Furthermore, the execution order of the two steps in step S2 is related to the running speed of the continuously cast billet being sheared; when the running speed of the continuously cast billet matches the running speed of the oscillating shear, step S2B is executed first or steps S2B and S2A are executed simultaneously; when the running speed of the continuously cast billet is greater than the running speed of the oscillating shear, step S2A is executed first, and step S2B is executed only after the running speed of the continuously cast billet slows down and matches the running speed of the oscillating shear.

[0015] Furthermore, prior to performing step S5, the damaged blank on the conveyor rollers has been processed; the conveyor rollers have the function of conveying along the production line direction and conveying perpendicular to the production line direction.

[0016] The beneficial effects of this invention are as follows: 1. This invention addresses the installation of a fault handling device between the roughing and finishing mills in a continuous casting and rolling production line. This device utilizes different positions of the fault-prone roller conveyor and the design of different stations for the movable upper roller of the roller shear exit pinch roll to achieve rapid switching between fault handling and normal production. When a fault occurs in the finishing or coiling area, the system can immediately adjust the roller conveyor position, cut off and guide the billet into the hopper, reducing metal scrap loss, while maintaining continuous casting operation. This flexible process design not only improves production continuity but also reduces fault response time, ensuring efficient operation of the production line.

[0017] 2. The equipment adopts a sinking discharge method, significantly improving the efficiency of handling scrap in case of accidents. After being cut by the roller shears, the scrap in the rear section falls directly into the hopper below under gravity, facilitating subsequent emptying via lateral movement or hoisting. The scrap in the front section is repeatedly cut and discharged by the roller shears, and combined with optional chute guidance, the discharge path is further optimized to ensure unobstructed conveying. This design, while fulfilling the fault handling function, makes scrap steel processing and removal operations more convenient and the working environment more friendly.

[0018] 3. The upper pinch roll at the exit of the roller shear has a dual function: during normal production, the rear swing position is used for tension detection and adjustment, making the rolling and transmission of the continuous casting billet more stable; in the event of a fault, the front swing position clamps the billet to ensure smooth shearing.

[0019] 4. 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 provides fault monitoring modules on the fault conveyor and the pinch roller. The setup of these monitoring systems and early warning modules ensures that the status of the fault handling device is knowable and controllable. It can also use AI early warning to identify the deterioration of equipment performance and early signs of failure in advance, and issue early warning signals.

[0020] 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

[0021] 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 normal production of a continuous casting and rolling production line using 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 a fault handling system for a continuous casting and rolling production line, using a fault handling device for a continuous casting and rolling production line according to the present invention. Figure 3 This is a schematic diagram of a fault handling device applied to a continuous casting and rolling production line according to the present invention.

[0022] Attached reference numerals: 1. Swing shear; 2. Conveyor roller conveyor; 3. Drum shear; 4. Emergency roller conveyor; 5. Upper roller; 6. Hopper; 11. Continuous casting machine; 12. Roughing mill; 13. Fault handling device; 14. Heating device; 15. Finishing mill; 16. Laminar flow cooling device; 17. High-speed flying shear; 18. Coiler. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Please see Figures 1-3 This is a fault handling device applied to a continuous casting and rolling production line. The continuous casting and rolling production line is arranged in sequence along the continuous casting billet transmission direction, including a continuous casting machine 11, a roughing mill 12, a heating device 14, a finishing mill 15, and downstream equipment. The downstream equipment includes a subsequent cooling device (such as a laminar flow cooling device 16) and a winding device (including a high-speed flying shear 17 and a coiler 18). The key to this invention is that a fault handling device 13 is provided between the roughing mill 12 and the finishing mill 15, specifically arranged between the roughing mill 12 and the heating device 14. The fault handling device 13 includes a swing shear 1, a conveying roller table 2, a drum shear 3 and an accident roller table 4 arranged sequentially along the continuous casting billet transmission direction, and a hopper 6 is arranged below the accident roller table 4. The swing shear 1 is used to cut the continuously cast billet as required; The conveyor roller conveyor 2 is used to convey the continuously cast billet; The roller shear 3 is used to cut the cast billet as required; The accident roller conveyor 4 is an oscillating roller conveyor that can swing from the horizontal direction to the lower vertical direction; The outlet of the drum shear 3 is equipped with a pinch roller, in which the upper roller 5 is a roller that can move in the horizontal direction; wherein the upper roller 5 is in the rear swing position during normal production and is used to detect the slab tension; in case of fault handling, it moves horizontally to the front swing position and together with the lower roller in the pinch roller to clamp the continuous casting slab; the rear swing position is diagonally above (i.e., behind) the lower roller, specifically in the direction away from the drum shear, and the front swing position is directly above the lower roller.

[0027] Furthermore, a hopper 6 is provided below the fault handling equipment area for storing accident metal strips.

[0028] Optionally, a chute is provided above the accident roller conveyor 4 to guide the billet cut by the roller shear 3 into the hopper 6.

[0029] Optionally, the chute above the accident roller conveyor 4 and the accident roller conveyor 4 form a conveying channel for the continuously cast billet.

[0030] Furthermore, both the accident roller conveyor 4 and the upper roller 5 of the pinch roller are equipped with fault monitoring modules. The fault monitoring modules periodically collect and analyze the status parameters of the equipment during operation, and use an AI early warning model to identify the deterioration of equipment performance and early signs of failure, and issue early warning signals.

[0031] Furthermore, the upper roller 5 of the pinch roller is equipped with a tension detection element, and the tension detection data is transmitted to the production control system so that the system model can make actual tension corrections.

[0032] The present invention also proposes a fault handling method for a continuous casting and rolling production line, which provides a swing shear 1, a conveyor roller 2, a drum shear 3, an emergency roller 4 and a hopper 6 arranged in sequence according to the transmission direction of the continuous casting billet; The accident roller conveyor 4 is an oscillating roller conveyor that can swing from the horizontal direction to the lower vertical direction; The outlet of the roller shear 3 is equipped with a pinch roller, and the upper roller 5 of the pinch roller is a roller that can move in the horizontal direction; the conveyor roller table 2 has the function of conveying along the production line direction and conveying perpendicular to the production line direction.

[0033] The fault handling method includes the following steps: S1: The accident roller conveyor 4 is adjusted from the horizontal direction to the lower vertical direction; S2: The execution order of the following two steps can be switched: S2A: The roller shear 3 cuts the continuous casting billet into a front casting billet section and a rear steel coil section; S2B: The swing shear 1 cuts the continuously cast billet into a front (upstream) part of the billet and a rear (downstream) part of the billet; S3: The head of the steel coil section at the rear end after being sheared by the roller shear 3 falls into the hopper 6 under the action of gravity; S4: The roller shear 3 shears the continuously cast billet fed from the upstream multiple times, and the sheared material falls into the hopper 6; S5: The swing shear 1 shears the continuously fed continuous casting billet in the continuous casting section, and the sheared material is removed from the line through the conveyor roller 2; S6: After the fault is resolved, the faulty roller conveyor 4 is adjusted from the vertical direction to the horizontal direction.

[0034] Furthermore, before the roller shear 3 cuts, the upper roller 5 in the pinch roller on its exit side moves horizontally from the rear swing position to the front swing position.

[0035] Furthermore, simultaneously with step S1, the roll gap of the roughing mill 11 before the shear 1 is opened.

[0036] Furthermore, after executing step S6, once the re-produced continuous casting billet is successfully threaded and tension is established, the upper roller 5 in the pinch rollers on the exit side of the drum shear 3 moves horizontally from the front swing position to the rear swing position.

[0037] Furthermore, the execution order of the two steps in step S2 is related to the running speed of the continuously cast billet being sheared. When the running speed of the continuously cast billet matches the running speed of the oscillating shear 1, step S2B is executed first, or steps S2B and S2A are executed simultaneously. When the running speed of the continuously cast billet is greater than the running speed of the oscillating shear 1, step S2A is executed first. When the running speed of the continuously cast billet slows down and matches the running speed of the oscillating shear 1, step S2B is executed.

[0038] Furthermore, prior to performing step S5, the damaged billet on conveyor roller 2 has already been processed.

[0039] This invention proposes a new fault handling method for continuous casting and rolling production lines within the existing production line equipment space through flexible equipment layout and process design, enabling rapid switching between fault handling and normal production states. The fault handling equipment proposed in this invention adopts a sinking discharge method, which, while fulfilling the production line fault handling function, makes the cutting and removal of the downstream faulty billet more convenient and provides a more user-friendly working environment. The upstream faulty billet is broken and sheared by a roller shear and discharged into the lower hopper, which is then removed and emptied by lateral movement or overhead crane transport. The roller shear exit pinch roller proposed in this invention plays a role in adjusting tension during normal production, making the production line more stable. During fault handling, it acts as a pinch roller to stabilize the shearing process, ensuring smooth fault handling. This invention proposes a fault handling method for the fault handling equipment of this continuous casting and rolling production line.

[0040] Example 1 Figure 1 The continuous casting and rolling production line shown operates at a casting speed of 5.8 m / min, a billet thickness of 105 mm, a billet width of 1500 mm, and an intermediate billet (i.e., the slab exiting the roughing mill) thickness of 10 mm with an intermediate billet speed of 1.02 m / s. The maximum designed shearing speed of the line's swing shear is 0.6 m / s, and the maximum designed shearing speed of the roller shear is 1.7 m / s. The billet temperature at the continuous casting exit is 1050℃, and the continuous casting billet temperature is 890℃. When the system detects a steel piling accident between the finishing mill stands, it issues an emergency fault signal and, based on the corresponding fault area and type, activates the contingency plan of stopping rolling but not casting.

[0041] 1) Reduce the casting speed of continuous casting machine 11 to 3.5m / min (while reducing the speed, subsequent steps are executed normally) to reduce the loss of metal scrap caused by the malfunction.

[0042] 2) The accident roller conveyor 4 is adjusted from the horizontal direction to the vertical direction; the upper roller 5 in the pinch roller on the exit side of the drum shear is moved horizontally from the rear swing position during normal production (slanted above the lower roller in the pinch roller) to the front swing position for accident handling (above the lower roller in the pinch roller), and the upper and lower rollers jointly clamp the continuous casting billet.

[0043] 3) The roller shear cuts the continuous casting billet into a front casting billet section and a rear steel coil section; the head of the rear steel coil section falls into the hopper 6.

[0044] 4) While performing step 3), since the speed of the continuously cast billet is greater than the maximum shearing speed of the swing shear 1, the swing shear 1 cannot work. The roll gap needs to be gradually opened from the roughing mill exit stand to the entrance stand in order to reduce the speed of the continuously cast billet.

[0045] 5) The roller shear 3 shears the continuously fed continuous casting billet multiple times, and the sheared material falls into the hopper 6.

[0046] 6) When the speed of the continuously cast billet is less than the maximum shearing speed of the swing shear 1, the swing shear 1 will shear.

[0047] 7) After being cut by the swing shear 1, the blank between the swing shear 1 and the roller shear 3 is broken and cut by the roller shear 3 and falls into the hopper 6.

[0048] 8) Once the area of ​​the conveyor roller table 2 between the swing shear 1 and the drum shear 3 is cleared, the continuously fed continuous casting billet can be cut to length by the swing shear 1, and then moved laterally out of the rolling line by the conveyor roller table 2 after the swing shear.

[0049] 9) After the steel stacking fault between the finishing mill stands is resolved and the entire line is ready to resume continuous production, the faulty roller conveyor 4 is adjusted from the vertical direction to the horizontal direction.

[0050] 8) The continuously fed billet from the upstream passes through the swing shear 1, the conveyor roller 2, the drum shear 3, and the accident roller 4 in sequence, and finally runs through the entire line. After the tension is established, the upper roller 5 moves horizontally from the front swing position of the accident handling to the rear swing position of normal production. It does not clamp the continuous casting billet, but is used for tension detection and adjustment of the continuous casting billet.

[0051] Example 2 Figure 1 The continuous casting and rolling production line shown operates at a casting speed of 5.6 m / min, a billet thickness of 100 mm, a billet width of 1250 mm, and an intermediate billet (the billet exiting the roughing mill) thickness of 18 mm. The intermediate billet speed is 0.52 m / s. The maximum design shearing speed of the production line is 0.6 m / s for the swing shear and 1.7 m / s for the roller shear. The billet temperature at the continuous casting exit is 1050℃, and the intermediate billet temperature is 880℃. In the event of a failure in the coiler switching system, which can be resolved quickly, a contingency plan for continuous casting without stopping rolling will be activated.

[0052] 1) The continuous casting machine 11 can reduce the casting speed to 3.5m / min (while the speed is reduced, the subsequent steps are executed normally), reducing the loss of metal scrap caused by the failure.

[0053] 2) The accident roller conveyor 4 is adjusted from the horizontal direction to the vertical direction; the upper roller 5 in the pinch roller on the exit side of the drum shear is moved horizontally from the rear swing position during normal production (slanted above the lower roller in the pinch roller) to the front swing position for accident handling (above the lower roller in the pinch roller), and the upper and lower rollers jointly clamp the continuous casting billet.

[0054] 3) Since the speed of the continuous casting billet is less than the maximum shearing speed of the swing shear 1 at this time, the swing shear 1 starts to shear the continuous casting billet; at the same time, the roller shear 1 cuts the continuous casting billet and divides the continuous casting billet into three parts: the billet (front), the intermediate billet (middle) and the steel coil (rear); the head of the rear steel coil part falls into the hopper 6.

[0055] 4) The roller shear 3 cuts and shears the intermediate billet between the swing shear 1 and the roller shear 3, and then the billet falls into the hopper 6.

[0056] 5) Once the area between the swing shear 1 and the roller shear 3 is cleared, the continuously fed continuous casting billet can be cut to length by the swing shear 1, and then moved laterally out of the rolling line by the conveyor roller 2 after the swing shear.

[0057] 6) After the steel stacking fault between the finishing mill stands is resolved and the entire line is ready to resume continuous production, the faulty roller conveyor 4 is adjusted from the vertical direction to the horizontal direction.

[0058] 7) The continuously fed continuous casting billet passes through the swing shear 1, conveyor roller 2, and drum shear 3 in sequence, and then through the accident roller 4, finally connecting the entire line. After the tension is established, the upper roller at the exit of the drum shear is moved from the front swing position (above the lower roller) during the accident handling to the rear swing position during normal production, for the purpose of tension detection of the metal strip.

[0059] Example 3 The difference between this embodiment and embodiment 1 is that in this embodiment, a chute is provided above the accident roller conveyor 4 to guide the billet cut by the roller shear 3 into the hopper 6; the chute above the accident roller conveyor 4 and the accident roller conveyor 4 form a conveying channel for the continuous casting billet.

[0060] Example 4 The difference between this embodiment and Embodiment 1 is that a fault monitoring device is installed on the accident roller conveyor, and a visual monitoring device is installed on the hopper. The accident roller conveyor fault monitoring device includes vibration sensors, temperature sensors, and noise sensors. The data monitored by these sensors is transmitted to the core processing unit. When these monitoring data exceed the limit values, the system will issue an alarm. In addition, the core processing unit is also connected to an AI early warning model, which uses machine learning of historical data to identify signs of equipment performance degradation and early failures in advance, and issues early warning signals. The visual monitoring device is connected to the centralized control room. When there are large foreign objects or billets exceeding the warning line in the hopper, it will trigger relevant warnings on the centralized control room screen, reminding the operators to handle the situation.

[0061] 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, wherein the continuous casting and rolling production line is arranged sequentially along the continuous casting billet transmission direction, comprising a continuous casting machine, a roughing mill, a finishing mill, and downstream equipment, characterized in that: The fault handling equipment is located between the roughing mill and the finishing mill, and includes a swing shear, a conveyor roller table, a drum shear and an emergency roller table arranged sequentially along the continuous casting billet transmission direction. The fault roller conveyor is a swing roller conveyor that can swing from the horizontal direction to the lower vertical direction; the outlet of the drum shear is equipped with a pinch roller, the upper roller of which is a roller that can move in the horizontal direction; wherein the upper roller is in the rear swing position during normal production and is used to detect the slab tension; during fault handling, it moves horizontally to the front swing position and together with the lower roller of the pinch roller to clamp the continuous casting slab; the rear swing position is obliquely above the lower roller, specifically in a direction away from the drum shear, and the front swing position is directly above the lower roller; A hopper is provided below the fault handling equipment area for storing accidental metal strips; the head of the rear steel coil section after being sheared by the roller shear falls into the hopper arranged below the fault handling equipment area under the action of gravity.

2. The fault handling device according to claim 1, characterized in that: The hopper is equipped with a visual inspection device to detect the state of waste material accumulation in the hopper during fault handling.

3. The fault handling device according to claim 1, characterized in that: A chute is provided above the accident roller conveyor to guide the billet cut by the roller shears into the hopper; the chute above the accident roller conveyor and the accident roller conveyor form a conveying channel for the continuous casting billet.

4. The fault handling device according to claim 1, characterized in that: Both the accident roller conveyor and the upper roller of the pinch roller are equipped with fault monitoring modules. By periodically collecting and analyzing the status parameters of the equipment during operation, an AI early warning model is used to identify the deterioration of equipment performance and early signs of failure, and to issue early warning signals.

5. The fault handling device according to claim 1, characterized in that: The upper roller of the pinch roller is equipped with a tension detection element. The tension detection data is transmitted to the production control system, and the system model is corrected for the actual tension.

6. A fault handling method applied to a continuous casting and rolling production line, characterized in that: Provide a fault handling device according to any one of claims 1 to 5; The fault handling method includes the following steps: S1: The accident roller conveyor is adjusted from the horizontal direction to the downward vertical direction; S2: The execution order of the following two steps can be switched: S2A: The roller shear cuts the continuous casting billet into a front casting billet section and a rear steel coil section; S2B: The swing shear cuts the continuously cast billet, which is divided into the upstream part of the billet and the downstream part of the billet. S3: The head of the rear steel coil section after being sheared by the roller shear falls into the hopper located below the fault handling equipment area under the action of gravity; S4: The roller shear performs multiple shearing operations on the continuously cast billet fed from the upstream, and the sheared material falls into the hopper; S5: The swing shear cuts the continuously fed continuous casting billet in the continuous casting section, and the cut material is removed from the line through the conveyor rollers; S6: After the fault is resolved, the faulty roller conveyor is adjusted from the vertical direction to the horizontal direction.

7. The fault handling method according to claim 6, characterized in that: Before the drum shear is cut, the upper roller in the pinch roller on its exit side moves horizontally from the rear swing position to the front swing position; After performing step S6, once the re-produced continuous casting billet is successfully threaded and tension is established, the upper roller in the pinch rollers on the exit side of the drum shear moves horizontally from the front swing position to the rear swing position. The rear swing position is behind the lower roller of the pinch roller, and the front swing position is above the lower roller.

8. The fault handling method according to claim 6, characterized in that: Simultaneously with step S1, the roll gap of the roughing mill before the shearing is opened.

9. The fault handling method according to claim 6, characterized in that: The execution order of the two steps in step S2 is related to the running speed of the continuously cast billet being sheared. When the running speed of the continuously cast billet matches the running speed of the oscillating shear, step S2B is executed first or steps S2B and S2A are executed simultaneously. When the running speed of the continuously cast billet is greater than the running speed of the oscillating shear, step S2A is executed first, and step S2B is executed only after the running speed of the continuously cast billet slows down and matches the running speed of the oscillating shear.

10. The fault handling method according to claim 6, characterized in that: Before step S5 is performed, the damaged blank on the conveyor rollers has been processed; the conveyor rollers have the function of conveying along the production line direction and conveying perpendicular to the production line direction.

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