A coiler system and a control method thereof

Abstract

The application discloses a coiler system and a control method thereof. The control method is applied to the control operation of the coiler system. The control method solves the contradiction between the steel stacking accident caused by the abnormal valve signal and the long-term high pressure difference operation of the hydraulic cylinder in the prior art by a valve control strategy. A dynamic decision mechanism based on the accurate detection of the strip position is established. When the second coiler completes the first strip coiling, the second valve immediately switches to the descending position. The valve state is flexibly adjusted according to the processing position of the next strip. The position state of the tail of the second strip leaving the entrance of the pre-guide plate is monitored. The timing judgment of the head of the third strip reaching the entrance of the pre-guide plate is combined. The accurate triggering of the ascending action of the first valve is realized. The system reliability and adaptability are improved. The dilemma of the steel stacking risk and the equipment life is avoided.

Description

Technical Field

[0001] This application relates to the field of hot rolling coiling machine technology, and in particular to a coiling machine system and its control method. Background Technology

[0002] In the hot-rolled strip steel production process, the coiler gate, as a key equipment component, plays a crucial role in accurately guiding the strip head into the coiler. However, existing gate control systems have significant defects, severely impacting the stability of the production line and the service life of the equipment. Specifically, for the coiler located in the middle of the production line, gate control faces a dilemma. On the one hand, when using a conventional control strategy—that is, placing the gate in the lowered position after the intermediate coiler completes its current strip winding and waits for the preceding coiler to complete its work before raising it to guide the next strip—the fast pace and high continuity of modern hot-rolled production lines mean that if the gate position signal is abnormal or the response is delayed, the system cannot identify and handle it in time. This can easily lead to strip stacking accidents, causing production line interruptions and equipment damage. On the other hand, to avoid the above problems, some production lines adopt a strategy of keeping the intermediate coiler gate in the raised position at all times. However, this approach results in the gate hydraulic cylinder operating under high pressure differential for extended periods, subjecting the hydraulic system to continuous load. This significantly increases the risk of failures such as wear on hydraulic cylinder seals and internal leakage, shortening equipment service life and increasing maintenance costs and downtime frequency. Existing technologies cannot ensure both production continuity and equipment reliability, thus hindering the efficient and stable operation of hot rolling production lines. Summary of the Invention

[0003] In view of the deficiencies in the prior art, this application provides a control method for a winding machine system to solve the problems of poor operational reliability and short lifespan caused by the gate control of the winding machine in the prior art.

[0004] The above-mentioned objectives of this application are mainly achieved through the following technical solutions: A control method for a coiling machine system, the control method being applied to the coiling machine system, the coiling machine system including a conveyor line, and a first coiling machine, a second coiling machine and a third coiling machine arranged sequentially along the rolling direction on the conveyor line, the first coiling machine being provided with a first gate, and the second coiling machine being provided with a second gate; The first valve and the second valve each have: The rising position guides the strip steel into the corresponding coiler interior; and The descending position can guide the strip along the rolling direction to the next coiler; The control method includes: Obtain the positions of the head and tail of the strip; When the second coiler is selected to process the first strip, and the head of the first strip enters the second coiler for coiling, the first coiler or the third coiler is selected to process the second strip. When the second coiler finishes processing the first strip, control the second valve to switch to the lowering position; When the third coiler is selected to process the second strip, the second valve is kept in the lowered position. When the first coiler is selected to process the second strip, the switching decision of the rising position of the first valve is executed: After the tail of the second strip leaves the entrance of the shear guide plate, the first event is determined: the head of the third strip reaches the entrance of the shear guide plate. When the first event is achieved, control the first valve to switch to the raised position; If the first event is not achieved, continue to obtain the tail position of the second strip, and when the tail of the second strip reaches the side guide plate inlet of the first coiler, control the first valve to switch to the rising position.

[0005] In an optional implementation, when the tail of the first strip passes through the pinch roller or side guide plate inlet of the second coiler, the tension of the second coiler drum enters the stable coiling stage, or the second coiler outputs a signal allowing unwinding, it is determined that the second coiler has completed processing the first strip.

[0006] In an optional implementation, when it is determined that the tail of the second strip has left the inlet of the shear guide plate, and when it is determined that the head of the third strip has reached the inlet of the shear guide plate, The second velocity curve of the tail of the second strip and the third velocity curve of the head of the third strip are obtained, as well as the second running time and the third running time accumulated from the moment when the tail of the second strip and the head of the third strip leave the roughing mill work roll. The second real-time distance and the third real-time distance of the tail of the second strip and the head of the third strip relative to the roughing mill work roll are calculated. Obtain the first actual distance between the roughing mill work roll and the entrance of the shear front guide plate; When the second real-time distance or the third real-time distance is greater than or equal to the first actual distance, it is determined that the tail of the second strip leaves the shear guide plate inlet, or the head of the third strip reaches the shear guide plate inlet.

[0007] In an optional implementation, when it is determined that the tail of the second strip leaves the entrance of the shear guide plate and when it is determined that the head of the third strip reaches the entrance of the shear guide plate, the change in the detection state of the hot metal detector at the entrance of the shear guide plate is used as a verification condition.

[0008] In an optional implementation, when it is determined that the tail of the second strip has reached the side guide plate inlet of the first coiler, Obtain the second velocity curve of the tail of the second strip and the fourth running time accumulated from the moment the tail of the second strip leaves the work roll of the last finishing mill; calculate the fourth real-time distance of the tail of the second strip relative to the work roll of the last finishing mill. Obtain the second actual distance between the work roll of the last finishing mill and the side guide plate entrance of the first coiler; When the fourth real-time distance is greater than or equal to the second actual distance, it is determined that the tail of the second strip has reached the side guide plate inlet of the first coiler.

[0009] In an optional implementation, when it is determined that the tail of the second strip reaches the side guide plate inlet of the first coiler, the detection status of at least one hot metal detector before the side guide plate inlet is used as a verification condition.

[0010] In an optional implementation, when it is determined that the first valve or the second valve is in the rising position or the falling position, the falling position is confirmed by the proximity switch located at the lower end of the movement trajectory of the first valve or the second valve outputting a falling position signal, and the rising position is confirmed by the proximity switch located at the upper end of the movement trajectory of the first valve or the second valve outputting a rising position signal.

[0011] In an optional implementation, when the first valve and the second valve are in the raised position, the oil pressure in the rodless chamber and the oil pressure in the rod chamber of the driving hydraulic cylinder of the first valve and the second valve can also be detected. When the difference between the oil pressure in the rodless chamber and the oil pressure in the rod chamber reaches a preset pressure difference threshold, it is confirmed that the first valve and the second valve are in the raised position.

[0012] In an optional implementation, before the head of the third strip reaches the finishing mill flying shear, when the second gate or the first gate reaches the rising position, the finishing mill's feeding and delivery of steel are controlled.

[0013] Based on the same inventive concept, this application also provides a winding machine system configured to perform the control method described above. The coiling machine system includes a conveyor line, and a first coiling machine, a second coiling machine and a third coiling machine arranged sequentially along the rolling direction on the conveyor line. The first coiling machine is provided with a first gate, and the second coiling machine is provided with a second gate. The first gate and the second gate are respectively driven by a hydraulic cylinder. The first valve and the second valve each have: The rising position guides the strip steel into the corresponding coiler interior; and The descending position can guide the strip along the rolling direction to the next coiler; The detection device includes a hot metal detector and / or a position detection switch disposed along the conveyor line; The controller is signal-connected to the detection device and signal-connected to the control terminals of the drive hydraulic cylinders of the first and second valves.

[0014] Compared with the prior art, the advantages of this application are: The control method in this application is applied to the control operation of a coiling machine system, which includes a conveyor line and a first coiling machine, a second coiling machine, and a third coiling machine arranged sequentially along the rolling direction on the conveyor line. The first coiling machine is provided with a first gate, and the second coiling machine is provided with a second gate. The first gate and the second gate respectively have: an upward position, which can guide the strip steel into the corresponding coiling machine; and a downward position, which can guide the strip steel along the rolling direction to the next coiling machine. The control method includes: obtaining the positions of the head and tail of the strip; selecting the second coiler to process the first strip, and when the head of the first strip enters the second coiler for coiling, selecting either the first coiler or the third coiler to process the second strip; when the second coiler finishes processing the first strip, controlling the second valve to switch to the lowered position; when the third coiler is selected to process the second strip, keeping the second valve in the lowered position; when the first coiler is selected to process the second strip, executing a switching decision for the uppered position of the first valve. After the tail of the second strip leaves the inlet of the shearing guide plate, a first event is determined: the head of the third strip reaches the inlet of the shearing guide plate. When the first event is achieved, the first valve is controlled to switch to the rising position. When the first event is not achieved, the tail position of the second strip is obtained, and when the tail of the second strip reaches the inlet of the side guide plate of the first coiler, the first valve is controlled to switch to the rising position.

[0015] This control method addresses the contradiction between steel stacking accidents caused by abnormal valve signals and the long-term high-pressure differential operation of hydraulic cylinders in existing technologies through a valve control strategy. A dynamic decision-making mechanism based on precise strip position detection is established. When the second coiler completes the winding of the first strip, the second valve immediately switches to the lowering position, flexibly adjusting its state according to the processing position of the next strip coil. When the third coiler is selected to process the second strip, the second valve remains in the lowering position. This avoids the risk of signal abnormalities caused by unnecessary position switching and reduces the frequency of hydraulic cylinder operation, significantly lowering the equipment failure rate.

[0016] By monitoring the position of the second strip tail leaving the shear guide plate inlet and combining this with the timing of the third strip head arriving at the shear guide plate inlet, precise triggering of the first valve's upward movement is achieved. This prevents premature upward movement, which would increase the load on the hydraulic system due to no-load operation, and also avoids premature upward movement, which would affect the normal introduction of the strip. When the condition for the third strip head to arrive cannot be met, the system automatically switches to the second judgment condition, using the arrival of the second strip tail at the first coiler side guide plate inlet as the trigger point, thus improving the system's reliability and adaptability.

[0017] In the high-speed, continuous hot rolling environment, ensuring the valves switch positions at the most opportune moment guarantees the smooth introduction of strip steel into the target coiler while minimizing the time the hydraulic cylinders are under high pressure differential. This balances the trade-off between production efficiency and equipment reliability, avoiding the dilemma of either facing steel pile-up risks or sacrificing equipment lifespan common in traditional solutions. In actual operation, it significantly reduces downtime caused by abnormal valve signals, while extending the service life of hydraulic cylinders, providing a reliable technical guarantee for the stable and efficient operation of hot rolling production lines. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. 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 operation of the winding machine system provided in the embodiments of this application; In the diagram: 100, conveyor line; 201, first coiler; 202, second coiler; 203, third coiler; 301, first gate; 302, second gate; 401, shear guide plate; 402, finishing shear; 403, roughing mill; 404, last finishing mill; 501, first strip; 502, second strip; 503, third strip. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0021] like Figure 1 As shown, Figure 1This is a schematic diagram of the operation of a coiling machine system provided in an embodiment of this application; a control method for a coiling machine system, the control method being applied to the coiling machine system, the coiling machine system including a conveyor line 100, and a first coiling machine 201, a second coiling machine 202 and a third coiling machine 203 arranged sequentially on the conveyor line 100 along the rolling direction, the first coiling machine 201 being provided with a first gate 301, and the second coiling machine 202 being provided with a second gate 302; The first valve 301 and the second valve 302 each have: The rising position guides the strip steel into the corresponding coiler interior; and The descending position can guide the strip along the rolling direction to the next coiler; The control method includes: Obtain the positions of the head and tail of the strip; When the second coiler 202 is selected to process the first strip 501, and the head of the first strip 501 enters the second coiler 202 for coiling, the first coiler 201 or the third coiler 203 is selected to process the second strip 502. When the second coiler 202 finishes processing the first strip 501, it controls the second valve 302 to switch to the lowering position; When the third winding machine 203 is selected to process the second strip 502, the second valve 302 is kept in the lowered position; When the first coiler 201 is selected to process the second strip 502, the switching decision of the rising position of the first valve 301 is executed: After the tail of the second strip 502 leaves the inlet of the shear guide plate 401, the first event is determined: the head of the third strip 503 reaches the inlet of the shear guide plate 401. When the first event is achieved, control the first valve 301 to switch to the raised position; If the first event is not achieved, the tail position of the second strip 502 is obtained, and when the tail of the second strip 502 reaches the side guide plate inlet of the first coiler 201, the first valve 301 is controlled to switch to the rising position.

[0022] The coiling system can include high-precision strip position detection devices, such as laser rangefinders or encoders, to acquire the precise coordinates of the strip head and tail on the conveyor line 100 in real time. When the second coiler 202 is processing the first strip 501, the control system selects either the first coiler 201 or the third coiler 203 as the processing equipment for the second strip 502 based on the overall rhythm of the production line and the strip specifications. The dynamic allocation mechanism fully considers the working status, cooling time, and equipment load of each coiler, ensuring the continuous and efficient operation of the production line.

[0023] When the second coiler 202 completes the coiling operation of the first strip 501, the second gate 302 immediately responds to the control command and switches to the lowering position. This action can be precisely executed by the hydraulic servo system. The stroke and speed of the gate descent are preset to ensure that the strip passes through smoothly and to avoid impact vibration caused by excessive speed.

[0024] When the third coiler 203 is selected to process the second strip 502, the second valve 302 is always kept in the lowered position, reducing the number of unnecessary valve actions, reducing the energy consumption of the hydraulic system, and more importantly, avoiding the risk of position signal loss caused by frequent valve switching.

[0025] For the case where the first coiler 201 processes the second strip 502, the control system employs a dual-condition judgment mechanism. First, after the tail of the second strip 502 leaves the entrance of the shear guide plate 401, it monitors in real time whether the head of the third strip 503 has reached the entrance of the shear guide plate 401. This timing judgment is based on the standard rolling speed of the strip and a position prediction algorithm. If the third strip 503 arrives in time, the first valve 301 is immediately controlled to switch to the rising position. If the third strip 503 fails to arrive on time due to changes in the production rhythm, the system activates the backup judgment condition, continuously tracks the tail position of the second strip 502, and forcibly triggers the rising action of the first valve 301 when it reaches the entrance of the side guide plate of the first coiler 201, ensuring that the valve can complete the position switching at the most accurate time under various production conditions.

[0026] In practical implementation, the control system also possesses a self-learning function, continuously optimizing the timing parameters of the valve movements based on historical production data to adapt to the production needs of strip steel of different specifications. Furthermore, this control method can be extended to complex production lines containing more coilers. By establishing a unified control logic framework, it enables collaborative operation among any number of coilers, providing a solid technical foundation for the intelligent upgrading of hot rolling production lines.

[0027] like Figure 1As shown, in an optional embodiment, the control method of this application is applied to the control operation of a coiling machine system. The coiling machine system includes a conveyor line 100 and a first coiling machine 201, a second coiling machine 202, and a third coiling machine 203 arranged sequentially along the rolling direction on the conveyor line 100. The first coiling machine 201 is provided with a first valve 301, and the second coiling machine 202 is provided with a second valve 302. The first valve 301 and the second valve 302 respectively have: an upward position, which can guide the strip steel into the corresponding coiling machine; and a downward position, which can guide the strip steel along the rolling direction to the next coiling machine. like Figure 1 As shown, the control method includes: obtaining the positions of the head and tail of the strip; selecting the second coiler 202 to process the first strip 501, and when the head of the first strip 501 enters the second coiler 202 for coiling, selecting either the first coiler 201 or the third coiler 203 to process the second strip 502; when the second coiler 202 has finished processing the first strip 501, controlling the second valve 302 to switch to the descending position; when the third coiler 203 is selected to process the second strip 502, keeping the second valve 302 in the descending position; when the first coiler 201 is selected to process the second strip 502, executing the switching decision of the ascending position of the first valve 301. After the tail of the second strip 502 leaves the inlet of the shear guide plate 401, a first event is determined: the head of the third strip 503 reaches the inlet of the shear guide plate 401. When the first event is achieved, the first valve 301 is controlled to switch to the rising position. When the first event is not achieved, the tail position of the second strip 502 is obtained, and when the tail of the second strip 502 reaches the side guide plate inlet of the first coiler 201, the first valve 301 is controlled to switch to the rising position.

[0028] This control method addresses the contradiction between steel stacking accidents caused by abnormal valve signals and the long-term high-pressure differential operation of hydraulic cylinders in existing technologies through a valve control strategy. A dynamic decision-making mechanism based on precise strip position detection is established. After the second coiler 202 completes coiling of the first strip 501, the second valve 302 immediately switches to the lowering position, flexibly adjusting its state according to the processing position of the next strip coil. When the third coiler 203 is selected to process the second strip 502, the second valve 302 remains in the lowering position. This avoids the risk of signal abnormalities caused by unnecessary position switching and reduces the operating frequency of the hydraulic cylinders, significantly lowering the equipment failure rate.

[0029] By monitoring the position of the tail of the second strip 502 leaving the inlet of the shear guide plate 401, and combining this with the timing of the head of the third strip 503 arriving at the inlet of the shear guide plate 401, precise triggering of the upward movement of the first valve 301 is achieved. This prevents premature upward movement, which would increase the burden on the hydraulic system due to no-load operation, and also prevents premature upward movement, which would affect the normal introduction of the strip. When the condition for the head of the third strip 503 to arrive cannot be met, the system automatically switches to the second judgment condition, that is, using the arrival of the tail of the second strip 502 at the inlet of the side guide plate of the first coiler 201 as the trigger point, thereby improving the reliability and adaptability of the system.

[0030] In the high-speed, continuous hot rolling environment, ensuring the valves switch positions at the most opportune moment guarantees the smooth introduction of strip steel into the target coiler while minimizing the time the hydraulic cylinders are under high pressure differential. This balances the trade-off between production efficiency and equipment reliability, avoiding the dilemma of either facing steel pile-up risks or sacrificing equipment lifespan common in traditional solutions. In actual operation, it significantly reduces downtime caused by abnormal valve signals, while extending the service life of hydraulic cylinders, providing a reliable technical guarantee for the stable and efficient operation of hot rolling production lines.

[0031] like Figure 1 As shown, in an optional embodiment, when the tail of the first strip 501 passes through the pinch roller or side guide plate of the second coiler 202, the tension of the second coiler 202 drum enters the stable winding stage, or the second coiler 202 outputs a signal allowing unwinding, it is determined that the second coiler 202 has completed processing the first strip 501.

[0032] In determining the timing for the second coiler 202 to complete the processing of the first strip 501, after the tail of the first strip 501 passes through the pinch roll or side guide plate inlet of the second coiler 202, it not only monitors whether the drum tension has entered the stable coiling stage, but also makes a comprehensive judgment based on the equipment's own uncoilable permission signal. This fully considers the physical characteristics of strip tension changes during hot rolling production, avoiding misjudgments that might occur due to a single condition. In particular, when the drum tension enters the stable stage, it indicates that the strip has completely broken free from the control of the pinch roll. At this time, switching the valve position will not interfere with the strip being coiled, ensuring a smooth transition in the production process. The uncoilable permission signal reflects the deep coupling between the equipment status and the control logic, ensuring that the valve action timing precisely matches the actual working state of the equipment, eliminating the risk of steel piling due to incorrect timing judgment.

[0033] like Figure 1 As shown, in an optional embodiment, when it is determined that the tail of the second strip 502 leaves the inlet of the shear guide plate 401, and when it is determined that the head of the third strip 503 reaches the inlet of the shear guide plate 401, The second velocity curve of the tail of the second strip 502 and the third velocity curve of the head of the third strip 503 are obtained, as well as the second running time and the third running time accumulated from the moment when the tail of the second strip 502 and the head of the third strip 503 leave the work roll of the roughing mill 403. The second real-time distance and the third real-time distance of the tail of the second strip 502 and the head of the third strip 503 relative to the work roll of the roughing mill 403 are calculated. Obtain the first actual distance between the work roll of the roughing mill 403 and the inlet of the shear guide plate 401; When the second real-time distance or the third real-time distance is greater than or equal to the first actual distance, it is determined that the tail of the second strip 502 leaves the entrance of the shear guide plate 401, or the head of the third strip 503 reaches the entrance of the shear guide plate 401.

[0034] When determining the position of the strip, a dynamic calculation model based on the speed curve and running time is used. By acquiring the speed curves of the tail of the second strip 502 and the head of the third strip 503 in real time, and combining them with the accumulated running time since leaving the roughing mill work roll 403, the real-time distance of the strip relative to the roughing mill work roll 403 can be accurately calculated.

[0035] Compared to fixed-time-delay control methods, this approach fully considers the acceleration changes and speed fluctuations of the strip during high-speed rolling, resulting in greater adaptability and accuracy. The system only determines that the strip has reached the designated position when the calculated real-time distance is greater than or equal to the actual distance from the roughing mill's 403 work roll to the shear guide plate 401 entrance. This avoids timing errors caused by changes in production line speed, ensuring precise synchronization between the gate's movement and the strip's position, and providing reliable technical support for high-speed continuous production.

[0036] like Figure 1 As shown, in an optional embodiment, when it is determined that the tail of the second strip 502 leaves the entrance of the shear guide plate 401, and when it is determined that the head of the third strip 503 reaches the entrance of the shear guide plate 401, the change in the detection state of the hot metal detector at the entrance of the shear guide plate 401 is used as a verification condition.

[0037] As a verification condition for position determination, the hot metal detector serves a crucial role in high-speed hot rolling environments. A single computational model may be affected by factors such as temperature fluctuations and equipment vibrations, while the hot metal detector directly senses the physical presence of the strip, providing an independent verification signal. When the computational model determines the strip position, the system simultaneously monitors the state changes of the hot metal detector at the entrance of the shear guide plate 401. Only when the results of both are consistent is the accuracy of the position determination confirmed. This significantly reduces the probability of misjudgment, especially when the strip head has an irregular shape or abnormal surface temperature, where the hot metal detector provides critical supplementary information.

[0038] like Figure 1 As shown, in an optional embodiment, when it is determined that the tail of the second strip 502 has reached the side guide plate inlet of the first coiler 201, The second speed curve of the tail of the second strip 502 is obtained, as well as the fourth running time accumulated from the moment the tail of the second strip 502 leaves the work roll of the last finishing mill 404; the fourth real-time distance of the tail of the second strip 502 relative to the work roll of the last finishing mill 404 is calculated. Obtain the second actual distance between the work roll of the last finishing mill 404 and the side guide plate entrance of the first coiler 201; When the fourth real-time distance is greater than or equal to the second actual distance, it is determined that the tail of the second strip 502 has reached the side guide plate inlet of the first coiler 201.

[0039] When determining that the tail of the second strip 502 has reached the entrance of the side guide plate of the first coiler 201, the calculation method directly using the roughing mill 403 as the reference will produce a large error in the finishing mill area because the reduction and speed adjustment of the finishing mill will significantly affect the movement trajectory of the strip. Using the work roll of the last finishing mill 404 as the reference point, the speed curve and running time of the tail of the second strip 502 are obtained, and its real-time distance relative to the last finishing mill 404 is calculated. This segmented calculation strategy is more consistent with the actual physical structure of the hot strip mill production line and can accurately reflect the movement state of the strip in the finishing mill area. When the calculated fourth real-time distance reaches the actual distance from the last finishing mill 404 to the entrance of the side guide plate of the first coiler 201, the system determines that the tail of the strip has reached the target position. This calculation method based on a local reference system significantly improves the accuracy of position determination and provides a reliable timing basis for the valve operation.

[0040] like Figure 1 As shown, in an optional embodiment, when it is determined that the tail of the second strip 502 reaches the side guide plate inlet of the first coiler 201, the detection status of at least one hot metal detector before the side guide plate inlet is used as a verification condition.

[0041] The detection status of the hot metal detector before the side guide plate inlet serves as a verification condition. In high-speed production, detection at the tail end of the strip is often more difficult than at the head due to its irregular shape and uneven temperature distribution. Using the detection status as the criterion—the change from the presence of a detection signal to its absence—provides anti-interference characteristics. When the strip tail passes the detector, the signal changes from a "metal present" state to a "metal absent" state; this state change is more stable and reliable than a simple "metal present" signal. Based on the calculation model, the system performs dual verification using the detection status of at least one preceding hot metal detector. Even with abnormal strip tail shapes or large temperature fluctuations, the accuracy of the judgment is ensured, exhibiting stronger environmental adaptability and anti-interference capabilities.

[0042] like Figure 1 As shown, in an optional embodiment, when it is determined that the first valve 301 or the second valve 302 is in the rising position or the falling position, the falling position is confirmed by the proximity switch located at the lower end of the movement trajectory of the first valve 301 and the second valve 302 outputting a falling position signal, and the rising position is confirmed by the proximity switch located at the upper end of the movement trajectory of the first valve 301 and the second valve 302 outputting a rising position signal.

[0043] Proximity switches are installed at the upper and lower endpoints of the movement trajectories of the first valve 301 and the second valve 302, respectively. When the first valve 301 or the second valve 302 reaches the lower position, the lower endpoint proximity switch outputs a lowered-to-complete signal; when the first valve 301 or the second valve 302 reaches the upper position, the upper endpoint proximity switch outputs an ascended-to-complete signal. Compared with traditional hydraulic pressure feedback or time-delay control, this method offers higher reliability and response speed. Crucially, the installation positions of the proximity switches are precisely calculated and field-tested to ensure that the signal is triggered only when the valve has fully reached the target position, avoiding false triggering due to mechanical backlash or vibration. This multi-position confirmation mechanism provides a reliable hardware foundation for the control system, eliminating the risk of steel stacking accidents caused by abnormal position signals.

[0044] like Figure 1 As shown, in an optional embodiment, when it is determined that the first valve 301 and the second valve 302 are in the rising position, the oil pressure in the rodless chamber and the oil pressure in the rod chamber of the driving hydraulic cylinder of the first valve 301 and the second valve 302 can also be detected. When the difference between the oil pressure in the rodless chamber and the oil pressure in the rod chamber reaches a preset pressure difference threshold, it is confirmed that the first valve 301 and the second valve 302 are in the rising position.

[0045] Hydraulic cylinder differential pressure detection serves as an auxiliary means of valve position confirmation. When determining that the first valve 301 or the second valve 302 is in the rising position, it relies not only on the proximity switch signal but also monitors the difference between the rodless chamber oil pressure and the rod chamber oil pressure of the driving hydraulic cylinder in real time. When the differential pressure reaches a preset threshold, it indicates that the hydraulic cylinder has overcome the load resistance, and the valve is indeed in a stable rising position. This effectively identifies possible abnormalities such as malfunctions or mechanical jamming of the proximity switch. The differential pressure threshold is set by comprehensively considering the valve's weight, frictional resistance, and hydraulic system characteristics. Through on-site calibration and adaptive adjustment, it ensures accurate reflection of the valve's actual position under various operating conditions, thereby improving the system's safety and reliability.

[0046] like Figure 1 As shown, in an optional embodiment, before the head of the third strip 503 reaches the finishing shear 402, when the second valve 302 or the first valve 301 reaches the rising position, the finishing mill is controlled to feed and deliver steel.

[0047] The timing control strategy for steel feeding and delivery in the finishing mill involves strictly monitoring the positioning status of either the second gate 302 or the first gate 301 before the head of the third strip 503 reaches the finishing shear 402. Only when either gate 302 or the first gate 301 has fully reached its upward position is the steel feeding and delivery operation permitted. By precisely calculating the matching relationship between the gate's actuation time and the strip's movement time, the system can maximize production efficiency while ensuring safety. It also avoids strip collision accidents caused by gates not being in position and reduces unnecessary waiting time by optimizing the timing of each piece of equipment.

[0048] like Figure 1 As shown, based on the same inventive concept, this application also provides a winding machine system configured to perform the control method described above. The coiling machine system includes a conveyor line 100, and a first coiler 201, a second coiler 202 and a third coiler 203 arranged sequentially on the conveyor line 100 along the rolling direction. The first coiler 201 is provided with a first valve 301, and the second coiler 202 is provided with a second valve 302. The first valve 301 and the second valve 302 are respectively driven by a hydraulic cylinder. The first valve 301 and the second valve 302 each have: The rising position guides the strip steel into the corresponding coiler interior; and The descending position can guide the strip along the rolling direction to the next coiler; The detection device includes a hot metal detector and / or a position detection switch disposed along the conveyor line 100; The controller is signal-connected to the detection device and signal-connected to the control terminals of the driving hydraulic cylinders of the first valve 301 and the second valve 302.

[0049] Hot metal detectors arranged at key locations along conveyor line 100 can employ dual-wavelength infrared detection technology, effectively distinguishing the thermal radiation differences between the strip steel body and the iron oxide scale, thus improving detection accuracy. Position detection switches can be high-temperature resistant and vibration-resistant inductive proximity switches, installed at precise endpoints of the movement trajectories of the first valve 301 and the second valve 302. Crucially, the system can employ a multi-detector cross-arrangement strategy at key locations such as the entrance to the shear guide plate 401 and the side guide plate entrance. When one detector signal is abnormal, adjacent detectors can provide backup signals, achieving a fail-safe mode. This provides the control system with rich and reliable status information, a prerequisite for achieving precise timing control.

[0050] The controller can integrate a strip dynamics model, enabling it to dynamically adjust the timing parameters of the valve action based on the current rolling speed, strip specifications, and temperature field distribution. The controller also features a self-learning function, continuously optimizing the speed curve calculation model and differential pressure threshold settings by analyzing historical production data to adapt to the production needs of different steel grades and specifications.

[0051] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0052] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0053] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this 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, they should not be construed as limitations on this invention.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0056] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0057] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0058] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A control method for a winding machine system, characterized in that, The control method is applied to a coiling machine system, which includes a conveyor line and a first coiling machine, a second coiling machine and a third coiling machine arranged sequentially along the rolling direction on the conveyor line. The first coiling machine is provided with a first gate, and the second coiling machine is provided with a second gate. The first valve and the second valve each have: The rising position can guide the strip steel into the corresponding coiler. as well as The descending position can guide the strip along the rolling direction to the next coiler; The control method includes: Obtain the positions of the head and tail of the strip; When the second coiler is selected to process the first strip, and the head of the first strip enters the second coiler for coiling, the first coiler or the third coiler is selected to process the second strip. When the second coiler finishes processing the first strip, control the second valve to switch to the lowering position; When the third coiler is selected to process the second strip, the second valve is kept in the lowered position. When the first coiler is selected to process the second strip, the switching decision of the rising position of the first valve is executed: After the tail of the second strip leaves the entrance of the shear guide plate, the first event is determined: the head of the third strip reaches the entrance of the shear guide plate. When the first event is achieved, control the first valve to switch to the raised position; If the first event is not achieved, continue to obtain the tail position of the second strip, and when the tail of the second strip reaches the side guide plate inlet of the first coiler, control the first valve to switch to the rising position.

2. The control method for the winding machine system as described in claim 1, characterized in that: When the tail of the first strip passes through the pinch roller or side guide plate inlet of the second coiler, the tension of the second coiler drum enters the stable coiling stage, or the second coiler outputs a signal allowing unwinding, it is determined that the second coiler has completed processing the first strip.

3. The control method for the winding machine system as described in claim 1, characterized in that: When it is determined that the tail of the second strip has left the inlet of the shear guide plate, and when it is determined that the head of the third strip has reached the inlet of the shear guide plate, The second velocity curve of the tail of the second strip and the third velocity curve of the head of the third strip are obtained, as well as the second running time and the third running time accumulated from the moment when the tail of the second strip and the head of the third strip leave the roughing mill work roll. The second real-time distance and the third real-time distance of the tail of the second strip and the head of the third strip relative to the roughing mill work roll are calculated. Obtain the first actual distance between the roughing mill work roll and the entrance of the shear front guide plate; When the second real-time distance or the third real-time distance is greater than or equal to the first actual distance, it is determined that the tail of the second strip leaves the shear guide plate inlet, or the head of the third strip reaches the shear guide plate inlet.

4. The control method for the winding machine system as described in claim 3, characterized in that: When it is determined that the tail of the second strip leaves the entrance of the shear guide plate, and when it is determined that the head of the third strip reaches the entrance of the shear guide plate, the change in the detection state of the hot metal detector at the entrance of the shear guide plate is used as a verification condition.

5. The control method for the winding machine system as described in claim 1, characterized in that: When it is determined that the tail of the second strip reaches the inlet of the side guide plate of the first coiler, Obtain the second velocity curve of the tail of the second strip and the fourth running time accumulated from the moment the tail of the second strip leaves the work roll of the last finishing mill; calculate the fourth real-time distance of the tail of the second strip relative to the work roll of the last finishing mill. Obtain the second actual distance between the work roll of the last finishing mill and the side guide plate entrance of the first coiler; When the fourth real-time distance is greater than or equal to the second actual distance, it is determined that the tail of the second strip has reached the side guide plate inlet of the first coiler.

6. The control method for the winding machine system as described in claim 5, characterized in that: When it is determined that the tail of the second strip reaches the side guide plate inlet of the first coiler, the detection status of at least one hot metal detector before the side guide plate inlet is used as a verification condition.

7. The control method for the winding machine system as described in claim 1, characterized in that: When it is determined that the first or second valve is in the rising or falling position, the falling position is confirmed by the proximity switch located at the lower end of the movement trajectory of the first or second valve outputting a falling position signal, and the rising position is confirmed by the proximity switch located at the upper end of the movement trajectory of the first or second valve outputting a rising position signal.

8. The control method for the winding machine system as described in claim 7, characterized in that: When the first valve and the second valve are in the rising position, the oil pressure in the rodless chamber and the oil pressure in the rod chamber of the driving hydraulic cylinder of the first valve and the second valve can also be detected. When the difference between the oil pressure in the rodless chamber and the oil pressure in the rod chamber reaches a preset pressure difference threshold, it is confirmed that the first valve and the second valve are in the rising position.

9. The control method for the winding machine system as described in claim 1, characterized in that: Before the head of the third strip reaches the finishing mill flying shear, when the second gate or the first gate reaches the rising position, the finishing mill is controlled to feed and deliver steel.

10. A winding machine system, characterized in that, The winding machine system is configured to perform the control method as described in any one of claims 1-9. The coiling machine system includes a conveyor line, and a first coiling machine, a second coiling machine and a third coiling machine arranged sequentially along the rolling direction on the conveyor line. The first coiling machine is provided with a first gate, and the second coiling machine is provided with a second gate. The first gate and the second gate are respectively driven by a hydraulic cylinder. The first valve and the second valve each have: The rising position can guide the strip steel into the corresponding coiler. as well as The descending position can guide the strip along the rolling direction to the next coiler; The detection device includes a hot metal detector and / or a position detection switch disposed along the conveyor line; The controller is signal-connected to the detection device and signal-connected to the control terminals of the drive hydraulic cylinders of the first and second valves.

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