Strip steel conveying device and method and strip steel rolling production line

Abstract

The invention discloses a strip steel conveying device and method and a strip steel rolling production line, which can be used for conveying strip steel output from an uncoiling machine to a strip steel processing device, such as an acid pickling machine and an inlet loop of a normalizing furnace, in the operation process, when the strip steel is broken, a control mechanism controls the uncoiling machine and a first motor to stop in time, and meanwhile, the strip steel is conveyed to the strip steel processing device. The telescopic mechanism controls the clamping roller set to clamp the strip steel, so that the broken strip steel is prevented from being stacked in the inlet loop, and potential safety hazards caused by throwing out of the broken strip steel are avoided.

Description

Technical Field

[0001] The present invention relates to Strip processing The technical field relates particularly to a strip steel conveying device, method and strip steel rolling production line. Background Art

[0002] During the continuous rolling process of strip steel, if the strip breaks and the machine cannot be stopped in time, the head and tail of the broken strip will be thrown out under the force, posing a great safety risk. It will also cause a large amount of strip steel to pile up in the production line, causing long-term shutdown and affecting the unit output. Summary of the invention

[0003] In view of the above problems, the present application is proposed to provide a strip steel conveying device, method and strip steel rolling production line that overcome the above problems or at least partially solve the above problems.

[0004] In a first aspect, a strip steel conveying device is provided. 1. A strip steel conveying device, characterized in that it comprises an unwinder, a conveying roller group, a clamping roller group, and a control mechanism, wherein the strip steel on the unwinder is conveyed to an inlet looper of a strip steel rolling production line through the conveying roller group and the clamping roller group;

[0005] The conveying roller group includes a plurality of active rollers arranged at intervals and a first motor, wherein the output shaft of the first motor is connected to the active roller and is used to drive the strip steel on the active roller to run;

[0006] The clamping roller group includes a tension roller, a pressure roller, and a telescopic mechanism; there is a gap between the pressure roller and the tension roller, and the telescopic mechanism is fixedly connected to the pressure roller and is used to control the pressure roller to move toward the tension roller when stretched, so as to clamp the strip passing through the gap;

[0007] The control mechanism is electrically connected to the uncoiler, the first motor and the telescopic mechanism respectively, and is used to obtain the actual tension output by the uncoiler. When the actual tension changes with time and reaches a set fault condition, the uncoiler and the first motor are controlled to stop running and the telescopic mechanism is controlled to extend.

[0008] Optionally, also include:

[0009] Deviation detection mechanism, used to detect the deviation of the strip;

[0010] Deviation correction mechanism, used to correct the deviation of the strip during operation;

[0011] The control mechanism is electrically connected to the deviation detection mechanism and the deviation correction mechanism, and is used for receiving the deviation amount of the strip sent by the deviation detection mechanism, determining the deviation correction amount according to the deviation amount of the strip, and controlling the operation of the deviation correction mechanism according to the deviation correction amount; and when the deviation amount of the strip exceeds a set threshold value, controlling the uncoiler and the first motor to stop running.

[0012] Optionally, the uncoiler includes a sleeve, a second motor, and a frequency converter, and an output end of the second motor is drivingly connected to the sleeve to drive the sleeve to rotate;

[0013] The frequency converter is electrically connected to the second motor and the control mechanism, and is used to receive the target tension sent by the control mechanism; determine the target torque according to the target tension; control the operation of the second motor according to the target torque, and collect the actual torque output by the second motor;

[0014] The actual tension output by the uncoiler is obtained, specifically including: a control mechanism receives the actual torque output by the second motor sent by the frequency converter, and determines the actual tension output by the second motor according to the actual torque output by the second motor as the actual tension output by the uncoiler.

[0015] Optionally, the control mechanism includes a first controller, the first controller is electrically connected to the frequency converter, and is used to receive the actual torque output by the second motor sent by the frequency converter, determine the actual tension output by the uncoiler according to the actual torque output by the second motor, and determine the difference between the actual tension and the target tension;

[0016] The frequency converter is also used to receive the difference between the actual tension and the target tension sent by the first controller, and control the operation of the second motor according to the difference between the actual tension and the target tension.

[0017] Optionally, the control mechanism also includes a second controller, which is electrically connected to the first controller, the telescopic mechanism, and the first motor, respectively, and is used to receive the actual tension output by the second motor sent by the first controller, and when a set fault condition is reached according to the change in the actual tension, send a stop signal to the first controller, and control the first motor to stop running and control the telescopic mechanism to extend. The first controller controls the second motor to stop running according to the stop signal.

[0018] Optionally, the set fault condition is: the actual tension output by the second motor drops to less than a set tension threshold, and the rate at which the actual tension output by the second motor drops is greater than or equal to a set rate threshold.

[0019] Optionally, the tension threshold is set to be less than 5% of the target tension.

[0020] Optionally, the number of uncoilers is N, wherein N is a positive integer greater than or equal to 2, and the strip conveying device further includes a welder, which is disposed on one side of the N uncoilers close to an inlet looper.

[0021] In a second aspect, a strip steel conveying method is provided, which is applied to the strip steel conveying device in the first aspect, and the method comprises:

[0022] When the strip on the uncoiler passes through the conveying roller group and the clamping roller group and is sent to the inlet looper of the strip rolling production line, the actual tension output by the uncoiler is obtained;

[0023] When the actual tension changes with time and reaches a set fault condition, the uncoiler and the first motor are controlled to stop running and the telescopic mechanism is controlled to extend.

[0024] In a third aspect, a strip steel rolling production line is provided, comprising a pickling machine, an inlet looper and the strip steel conveying device of the first aspect, wherein the pickling machine is arranged on a side of the inlet looper away from the strip steel conveying device.

[0025] The technical solution provided by this application has at least the following technical effects or advantages:

[0026] The strip conveying device, method and strip rolling production line provided in the present application can be used to convey the strip output from the uncoiler to the strip processing device, such as the entrance looper of the pickling machine and the normalizing furnace. During operation, when the strip breaks, the control mechanism promptly controls the uncoiler and the first motor to stop, while the telescopic mechanism controls the clamping roller group to clamp the strip to prevent the broken strip from stacking in the entrance looper and to avoid the broken strip from being thrown out to cause safety hazards.

[0027] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0029] Figure 1 The wire frame of the strip steel conveyor in the embodiment of the present application Figure 1 ;

[0030] Figure 2 Wireframe of the strip steel processing device in the embodiment of the present application Figure 2 ;

[0031] Figure 3 This is a schematic diagram of a deviation detection mechanism in an embodiment of the present application;

[0032] Figure 4 This is a schematic diagram of a three-roller deviation correction mechanism in an embodiment of the present application;

[0033] Figure 5Wireframe of the strip steel processing device in the embodiment of the present application Figure 3

[0034] Figure 6 This is a flow chart of the strip steel processing method in the embodiment of the present application;

[0035] Figure 7 This is a wireframe diagram of a strip steel rolling production line in an embodiment of the present application. DETAILED DESCRIPTION

[0036] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0037] Various structural schematic diagrams according to embodiments of the present application are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0038] In order to better understand the above-mentioned technical scheme, the above-mentioned technical scheme will be described in detail below in combination with specific implementation methods. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical scheme of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0039] During the continuous production of strip steel, if the strip breaks and the machine cannot be stopped in time, the head and tail of the broken strip will be thrown out under the force, which will pose a great safety risk. It will also cause a large amount of strip steel to pile up in the production line, causing long-term shutdown and affecting the unit output.

[0040] Taking the normalizing pickling unit for processing strip steel as an example, the normalizing pickling unit is used for normalizing and pickling of hot-rolled coils. The finished products are sent to the rolling mill for rolling, and the secondary normalization of some steel grades is completed at the same time. The normalizing pickling unit is a continuous production mode. There are two uncoilers arranged at the entrance section. The strip steel on the two uncoilers is subjected to a system of operations such as alternate uncoiler, straightening, thickness measurement, centering, head and tail cutting, welding, and deviation correction, and then enters the normalizing pickling unit through the entrance looper.

[0041] In the continuous production process, there are many quality defects at the head and tail of the strip, such as single-side waves, middle waves, compound waves, visible edge cracks, invisible edge cracks, etc. The impacts of these defects include: the head and tail of the strip deviate and the edge of the strip scratches the equipment frame, causing the strip to break; the edge cracks at the head and tail of the strip are also prone to tearing or breaking when passing through the correction device.

[0042] After the strip is broken, the tail of the strip is thrown out under the tension of the entrance loop and enters the entrance loop, causing a large amount of strip steel to pile up. There is a great safety risk in the processing process, and it also causes a long shutdown, affecting the unit output.

[0043] In view of this, the present application provides a strip conveying device, which controls the driving mechanism to stop running when the actual tension output by the driving mechanism changes over time and exceeds the set condition, so as to achieve timely shutdown when the strip breaks, and at the same time controls the extension of the telescopic mechanism to clamp the strip to avoid safety accidents caused by the strip being thrown out.

[0044] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be implemented independently or in combination with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0045] Please refer to Figure 1 , Figure 1 This is a wireframe diagram of the strip conveying device in the embodiment of the present application.

[0046] The strip steel conveying device 100 comprises: an uncoiler 101, a conveying roller set 102, a clamping roller set 103, and a control mechanism 104. The strip steel on the uncoiler 101 is conveyed to an inlet looper 702 of a strip steel rolling production line through the conveying roller set 102 and the clamping roller set 103.

[0047] The conveying roller group 102 includes a plurality of active rollers 1021 arranged at intervals and a first motor 1022. The output shaft of the first motor 1022 is connected to the active roller 1021 to drive the strip steel on the active roller 1021 to run;

[0048] The clamping roller group 103 includes a tension roller 1031, a pressure roller 1032, and a telescopic mechanism 1033; there is a gap between the pressure roller 1032 and the tension roller 1031, and the telescopic mechanism 1033 is fixedly connected to the pressure roller 1032, and is used to control the pressure roller 1032 to move toward the tension roller 1031 when stretched, so as to clamp the strip passing through the gap;

[0049] The control mechanism 104 is electrically connected to the uncoiler 101, the first motor 1022, and the telescopic mechanism 1033, respectively, and is used to obtain the actual tension output by the uncoiler 101. When the actual tension changes with time and reaches a set fault condition, the uncoiler 101 and the first motor 1022 are controlled to stop running and the telescopic mechanism 1033 is controlled to extend.

[0050] The strip conveying device 100 provided in the embodiment of the present application can be used for conveying strip steel, for example, it can be used to convey the strip steel of the uncoiler 101 to the entrance looper 702 of the normalizing and pickling machine 701 group, and the strip steel is stored in the entrance looper 702. When the strip steel breaks, the uncoiler 101 and the first motor 1022 are shut down, and the telescopic mechanism 1033 controls the clamping roller group 103 to clamp the strip steel to prevent the broken strip steel from stacking in the entrance looper 702, and to prevent the broken strip steel from being thrown out to cause a safety hazard.

[0051] Next, combine Figure 2-Figure 5 The strip steel conveying device 100 provided in the embodiment of the present application is described, and this example does not constitute a limitation on the embodiment of the present application. The following embodiments can be combined with each other, and the same or similar concepts or processes will not be described in detail.

[0052] In some optional embodiments, such as Figure 2 As shown, the strip steel conveying device 100 provided in the embodiment of the present application further includes: a deviation detection mechanism 201, which is used to detect the deviation amount of the strip steel;

[0053] A deviation correction mechanism 202, used to correct the deviation of the strip during operation;

[0054] The control mechanism 104 is electrically connected to the deviation detection mechanism 201 and the deviation correction mechanism 202, and is used for receiving the deviation amount of the strip sent by the deviation detection mechanism 201, determining the deviation correction amount according to the deviation amount of the strip, and controlling the operation of the deviation correction mechanism 202 according to the deviation correction amount; and when the deviation amount of the strip exceeds a set threshold value, controlling the uncoiler 101 and the first motor 1022 to stop running.

[0055] The strip will deviate during operation, and the correcting mechanism 202 can correct the strip within a certain range. If the strip continues to deviate due to plate shape and other factors, and the degree of deviation exceeds the capacity of the correcting mechanism 202, the strip will deviate rapidly until it breaks. Therefore, the control mechanism 104 controls the drive mechanism to stop running when the deviation of the strip exceeds a set threshold value. The strip can be stopped quickly when the strip deviates severely and the correcting mechanism 202 loses its correcting ability, thereby avoiding strip breakage.

[0056] The deviation detection mechanism 201 and the deviation correction mechanism 202 can adopt a CPC deviation system, such as Figure 3 As shown, in order to detect the center position of the metal strip, the deviation detection mechanism 201 includes two pairs of sensors 301. The two pairs of sensors 301 are respectively installed on the working side and the transmission side of the strip 203, and are used to detect the deviation of the strip 203 on the working side and the transmission side respectively. The two pairs of sensors 301 are installed at positions symmetrical to the center of the same unit.

[0057] Each pair of sensors 301 includes a transmitter, a receiver, and a coil. There is a magnetic flux line between the transmitter and the receiver, and each pair of coils is a directional air-core transformer. When the strip passes through the gap between the transmitter and the receiver, it cuts the magnetic flux line. When the strip deviates, a magnetic flux difference is generated between the connected coils. The difference is processed by the control mechanism 104 and output as a measurement result as the deviation amount.

[0058] The correction mechanism 202 can adopt a three-roller correction device, such as Figure 4 As shown, it includes a frame 401, two supporting rollers 402, and an upper pressure roller 403. The two supporting rollers 402 are installed on the frame 401 in parallel, and the upper pressure roller 403 is located above the two supporting rollers 402. Both ends of the upper pressure roller 403 are connected to the frame 401 through a hydraulic cylinder. The running strip passes through the gap between the two supporting rollers 402 and the upper pressure roller 403. The control mechanism 104 is electrically connected to the hydraulic system of the hydraulic cylinder. The hydraulic cylinder is controlled to drive the upper pressure roller 403 to descend, so that a certain angle is formed between the strip and the roller surface to make the strip move laterally, so as to realize the deviation correction of the strip.

[0059] The control mechanism 104 receives the strip deviation signal fed back by the detection device, and outputs the result through the internal control algorithm to control the proportional valve output and thus the action of the hydraulic cylinder. The actual position of the hydraulic cylinder is detected by the linear displacement sensor 301 and fed back to the controller to form a closed-loop control.

[0060] The correcting mechanism 202 can correct the deviation of the strip within the stroke range of the hydraulic cylinder. If the strip continues to deviate due to the plate shape and other conditions, the hydraulic cylinder will be unable to provide correcting capability after reaching the full stroke. At this time, the strip will quickly deviate until it breaks. At this time, the control mechanism 104 determines that the deviation of the strip exceeds the set threshold based on the signal sent by the deviation detection mechanism 201, and can determine that the deviation of the strip exceeds the correcting capability of the correcting mechanism 202, and promptly controls the driving mechanism to stop running, so as to stop the strip from running and avoiding the strip from breaking after continuous deviation.

[0061] In a possible implementation, Figure 5 As shown, the uncoiler includes a sleeve 501, a second motor 502, and a frequency converter 503. The output end of the second motor 502 is transmission-connected to the sleeve 501 to drive the sleeve 501 to rotate.

[0062] The frequency converter 503 is electrically connected to the second motor 502 and the control mechanism 104, and is used to receive the target tension sent by the control mechanism 104; determine the target torque according to the target tension; control the operation of the second motor 502 according to the target torque, and collect the actual torque output by the second motor 502;

[0063] Obtaining the actual tension output by the uncoiler 101 specifically includes: the control mechanism 104 receives the actual torque output by the second motor 502 sent by the inverter 503, and determines the actual tension output by the second motor 502 according to the actual torque output by the second motor 502 as the actual tension output by the uncoiler 101.

[0064] In a possible implementation, Figure 5 As shown, the control mechanism 104 includes a first controller 504, which is electrically connected to the frequency converter 503 and is used to receive the actual torque output by the second motor 502 sent by the frequency converter 503, determine the actual tension output by the uncoiler 101 according to the actual torque output by the second motor 502, and determine the difference between the actual tension and the target tension; the frequency converter 503 is also used to receive the difference between the actual tension and the target tension sent by the first controller 504, and control the operation of the second motor 502 according to the difference between the actual tension and the target tension. The first controller 504 controls the operation of the second motor 502 through the frequency converter 503.

[0065] The control mechanism 104 also includes a second controller 505, which is electrically connected to the first controller 504, the telescopic mechanism 1033, and the first motor 1022, respectively, and is used to receive the actual tension output by the second motor 502 sent by the first controller 504, and when a set fault condition is reached according to the change in the actual tension, send a stop signal to the first controller 504, and control the first motor 1022 to stop running and control the telescopic mechanism 1033 to extend. The first controller 504 controls the second motor 502 to stop running according to the stop signal.

[0066] The first controller 504 is a transmission controller, and the second controller 505 is a PLC controller of a PLC control system. The transmission controller receives the tension setting value (i.e., the target tension) issued by the PLC control system through a communication link, and issues the tension setting value to the frequency converter 503. The frequency converter 503 detects the change in the torque of the second motor 502 and converts it into the actual tension through an internal algorithm. The transmission controller compares the deviation between the tension setting value and the actual tension, and controls the change in the torque of the second motor 502 by adjusting the output of the frequency converter 503, so that the actual tension can follow the target tension.

[0067] Still Figure 5As shown, the second controller 505 is also electrically connected to the deviation detection mechanism 201 and the deviation correction mechanism 202, and is used for receiving the deviation amount of the strip sent by the deviation detection mechanism 201, determining the deviation correction amount according to the deviation amount of the strip, and controlling the operation of the deviation correction mechanism 202 according to the deviation correction amount; and when the deviation amount of the strip exceeds a set threshold, controlling the first motor 1022 and the second motor 502 to stop running, so as to control the conveying roller group 102 and the uncoiler 101 to stop running, thereby realizing the parking of the strip conveying device 100.

[0068] In some optional embodiments, the set fault condition is: the set fault condition is: the actual tension output by the second motor 502 drops to less than the set tension threshold, and the rate at which the actual tension output by the second motor 502 drops is greater than or equal to the set rate threshold. Exemplarily, the set tension threshold is less than 5% of the target tension.

[0069] Under normal circumstances, the actual tension changes very little and not too fast. However, when the belt breaks, the actual tension output by the second motor 502 drops sharply. The PLC automation system receives the actual tension processed by the transmission control system, and combines it with the operating status of the entrance section. By comparing the set tension of the uncoiler 101 and the rate of change of the actual tension deviation within a certain time interval, the belt breakage is determined through internal logic, and the entrance belt breakage signal, i.e., the shutdown signal, is triggered at the moment the belt breakage is determined.

[0070] In some optional embodiments, the number of uncoilers 101 is N, where N is a positive integer greater than or equal to 2, and the strip conveying device 100 further includes a welder, which is disposed on one side of the N uncoilers 101 close to the entrance looper 702 .

[0071] The two uncoilers 101 are arranged at intervals, and the two uncoilers 101 uncoil alternately, and the tail of the previous strip and the head of the next strip are welded by a welding machine to ensure that the strip is continuously delivered to the inlet looper 702 of the strip rolling production line to ensure continuous production.

[0072] Based on the same inventive concept, the present application also provides a strip steel transmission method, please refer to Figure 6 , Figure 6 This is a flow chart of a strip steel conveying method in an embodiment of the present application. The strip steel conveying method includes:

[0073] S601. When the strip on the uncoiler passes through the conveying roller group and the clamping roller group and is sent to the inlet looper 702 of the strip rolling production line, the actual tension output by the uncoiler is obtained.

[0074] S602: When the actual tension changes with time and reaches a set fault condition, the uncoiler and the first motor are controlled to stop running and the telescopic mechanism is controlled to extend.

[0075] The strip conveying method provided in the embodiment of the present application can be used to convey the strip from the uncoiler 101 to the entrance looper 702 of the normalizing and pickling machine 701 group. The strip is stored in the entrance looper 702. When the strip breaks, the uncoiler 101 and the first motor 1022 are shut down, and the telescopic mechanism 1033 controls the clamping roller group 103 to clamp the strip to prevent the broken strip from stacking in the entrance looper 702 and to prevent the broken strip from being thrown out to cause a safety hazard.

[0076] Based on the same inventive concept, the present application also provides a strip steel rolling production line, please refer to Figure 7 , Figure 7 This is a wireframe diagram of a strip steel rolling production line in an embodiment of the present application. The strip steel rolling production line 700 includes: a pickling machine 701, an entrance looper 702, and the strip steel conveying device 100 provided in the above embodiment. The pickling machine 701 is arranged on the side of the entrance looper 702 away from the strip steel conveying device 100. The strip steel on the uncoiler 101 is sent to the entrance looper 702 of the strip steel rolling production line through a conveying roller group 102 and a clamping roller group 103. The strip steel sent out by the entrance looper 702 enters the pickling machine 701 for pickling.

[0077] The strip steel rolling production line 700 can be a pickling and normalizing production line. A normalizing machine is also arranged on the side of the pickling machine 701 away from the inlet looper 702. The strip steel outputted from the pickling machine 701 can enter the normalizing machine for normalization. During the pickling and normalizing of the strip steel, the control mechanism 104 obtains the actual tension outputted by the uncoiler 101. When the actual tension changes with time and reaches the set fault condition, the uncoiler 101 and the first motor 1022 are controlled to stop running and the telescopic mechanism 1033 is controlled to extend.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0079] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

Claims

1. A strip steel conveying device, characterized in that: It includes an uncoiler, a conveying roller group, a clamping roller group, and a control mechanism. The strip steel on the uncoiler is sent to the inlet looper of the strip steel rolling production line through the conveying roller group and the clamping roller group. The conveying roller group includes a plurality of active rollers arranged at intervals and a first motor, wherein the output shaft of the first motor is connected to the active roller and is used to drive the strip steel on the active roller to run; The clamping roller group includes a tension roller, a pressure roller, and a telescopic mechanism; there is a gap between the pressure roller and the tension roller, and the telescopic mechanism is fixedly connected to the pressure roller and is used to control the pressure roller to move toward the tension roller when extended, so as to clamp the strip passing through the gap; The control mechanism is electrically connected to the uncoiler, the first motor and the telescopic mechanism respectively, and is used to obtain the actual tension output by the uncoiler. When the actual tension changes over time and reaches a set fault condition, the uncoiler and the first motor are controlled to stop running and the telescopic mechanism is controlled to extend.

2. The strip steel conveying device according to claim 1, characterized in that: Also includes: A deviation detection mechanism, used for detecting the deviation amount of the strip steel; A deviation correction mechanism, used for correcting the deviation of the strip during operation; The control mechanism is electrically connected to the deviation detection mechanism and the deviation correction mechanism, and is used for receiving the deviation amount of the strip sent by the deviation detection mechanism, determining the deviation correction amount according to the deviation amount of the strip, and controlling the operation of the deviation correction mechanism according to the deviation correction amount; and controlling the uncoiler and the first motor to stop running when the deviation amount of the strip exceeds a set threshold value.

3. The strip steel conveying device according to claim 1, characterized in that: The uncoiler comprises a sleeve, a second motor, and a frequency converter, wherein the output end of the second motor is drivingly connected to the sleeve for driving the sleeve to rotate; The frequency converter is electrically connected to the second motor and the control mechanism, and is used to receive the target tension sent by the control mechanism; determine the target torque according to the target tension; control the operation of the second motor according to the target torque, and collect the actual torque output by the second motor; The obtaining of the actual tension output by the uncoiler specifically includes: the control mechanism receiving the actual torque output by the second motor sent by the inverter, and determining the actual tension output by the second motor according to the actual torque output by the second motor as the actual tension output by the uncoiler.

4. The strip steel conveying device according to claim 3, characterized in that: The control mechanism includes a first controller, which is electrically connected to the frequency converter and is used to receive the actual torque output by the second motor sent by the frequency converter, determine the actual tension output by the uncoiler according to the actual torque output by the second motor, and determine the difference between the actual tension and the target tension; The frequency converter is further used to receive the difference between the actual tension and the target tension sent by the first controller, and control the operation of the second motor according to the difference between the actual tension and the target tension.

5. The strip steel conveying device according to claim 4, characterized in that: The control mechanism also includes a second controller, which is electrically connected to the first controller, the telescopic mechanism, and the first motor, respectively, and is used to receive the actual tension output by the second motor sent by the first controller, and when a set fault condition is reached according to the change of the actual tension, send a stop signal to the first controller, and control the first motor to stop running and control the telescopic mechanism to extend. The first controller controls the second motor to stop running according to the stop signal.

6. The strip steel conveying device according to claim 5, characterized in that: The set fault condition is: the actual tension output by the second motor drops to less than a set tension threshold, and the rate at which the actual tension output by the second motor drops is greater than or equal to a set rate threshold.

7. The strip steel conveying device according to claim 6, characterized in that: The set tension threshold is less than 5% of the target tension.

8. The strip steel conveying device according to claim 1, characterized in that: The number of the uncoilers is N, wherein N is a positive integer greater than or equal to 2. The strip conveying device further comprises a welder, and the welder is arranged on one side of the N uncoilers close to the inlet looper.

9. A strip steel transmission method, characterized in that: Applied to the strip steel conveying device according to any one of claims 1 to 8, the method comprises: When the strip steel on the uncoiler passes through the conveying roller group and the clamping roller group and is sent to the inlet looper of the strip steel rolling production line, the actual tension output by the uncoiler is obtained; When the actual tension changes with time and reaches a set fault condition, the uncoiler and the first motor are controlled to stop running and the telescopic mechanism is controlled to extend.

10. A strip steel rolling production line, characterized in that: It comprises a pickling machine, an inlet looper and a strip conveying device as claimed in any one of claims 1 to 8, wherein the pickling machine is arranged on a side of the inlet looper away from the strip conveying device.

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