A control method and control system for reducing the tilt of a loop car

Abstract

The present application relates to the technical field of cold rolling, and particularly relates to a control method and a control system for reducing the inclination of a looper trolley. The control method comprises the following steps: detecting an actual tension value N1 of the strip at the looper inlet and an actual tension value N2 of the strip at the looper outlet; determining whether the value of N1 or N2 is less than or equal to a value A; if yes, stopping the production line; if no, calculating a deviation X of N2 relative to a set tension value N0 of the strip; and if the deviation is greater than or equal to a value B, stopping the production line. The control method and the control system for reducing the inclination of the looper trolley can reduce the inclination and overturning of the looper trolley to a certain extent by detecting the actual tension value N1 of the strip at the looper inlet and the actual tension value N2 of the strip at the looper outlet.

Description

Technical Field

[0001] This invention relates to the field of cold rolling technology, and in particular to a control method and control system for reducing the tilting of the looper trolley. Background Technology

[0002] The continuous annealing production line of the cold rolling mill covers various steel grades such as low carbon steel, ordinary carbon steel, and high strength steel. The equipment is mainly divided into uncoiling section, welding machine, cleaning section, inlet looper, annealing furnace, leveling machine, outlet looper, oiling, and coiler. The inlet / outlet looper mainly serves to store strip steel, ensure the normal speed of production of the annealing furnace / coiler, and act as a buffer to ensure normal production in the same welding process section.

[0003] In related technologies, the inlet and outlet loopers of continuous annealing production lines are both vertical loopers, mainly composed of a hoisting motor, hoist, wire rope, sheave, looper trolley, counterweight, and other mechanisms. When problems such as hoisting motor malfunction, wire rope damage, or weld breakage between two coils of strip steel occur, the looper trolley may tilt or even overturn, directly causing serious consequences. Summary of the Invention

[0004] This application provides a control method and control system for reducing the tilting of the looper trolley, which solves the technical problem in related technologies that when the hoisting motor malfunctions, the wire rope is damaged, or the weld between the two coils of strip steel breaks, the looper trolley will tilt or even overturn, directly causing serious consequences.

[0005] This application provides a control method for reducing the tilting of a looper trolley. The control method is applied to a continuous annealing production line, which includes a strip steel and a looper. The strip steel passes through the looper, which includes a looper trolley for storing or releasing the strip steel. The control method includes:

[0006] The actual tension value N1 of the strip at the looper inlet and the actual tension value N2 of the strip at the looper outlet are detected.

[0007] Determine whether the value of N1 or N2 is less than or equal to the value A. If yes, stop the production line. If not, calculate the deviation X of N2 relative to the set tension value N0 of the strip. If the deviation X is greater than or equal to the value B, stop the production line.

[0008] In some implementations, the value A is 3 kN.

[0009] In some implementations, determining whether the actual tension value N is less than or equal to the value A, and if so, stopping the production line; if not, calculating the deviation X of the actual tension value N relative to the set tension value N0 of the strip, and if the deviation is greater than or equal to the value B, stopping the production line, specifically includes:

[0010] Determine whether the actual tension value N is less than or equal to the value A. If yes, stop the production line after a delay. If not, calculate the deviation X of the actual tension value N relative to the set tension value N0 of the strip. If the deviation is greater than or equal to the value B, stop the production line after a delay.

[0011] In some implementations, stopping the production line after a delay if the deviation is greater than or equal to value B specifically includes:

[0012] If the deviation is greater than or equal to the value B, the production line shall be stopped after a delay of t1.

[0013] If the deviation is greater than or equal to the value C, the production line shall be stopped after a delay of t2.

[0014] Where C > B, t2 < t1.

[0015] In some implementations, the value B is 30% and the value C is 50%.

[0016] In some implementations, t1 = 2.5s and t2 = 1s.

[0017] In some embodiments, tension gauge rollers are provided at both the inlet and outlet of the looper, and the tension gauge rollers are used to detect the actual tension value N1 of the strip at the looper inlet and the actual tension value N2 of the strip at the looper outlet.

[0018] This application embodiment also provides a control system for reducing the tilt of the looper trolley. The control system is applied to the control method described above, and the control system includes:

[0019] Detection module: used to detect the actual tension value N1 of the strip at the looper inlet and the actual tension value N2 of the strip at the looper outlet;

[0020] Judgment module: Used to determine whether the value of N1 or N2 is less than or equal to the value A;

[0021] Calculation module: used to calculate the deviation X of N2 relative to the set tension value N0 of the strip;

[0022] Execution module: Used to stop the production line when the value of N1 or N2 is less than or equal to the value A; and to stop the production line when the deviation X of N2 relative to the set tension value N0 of the strip is greater than or equal to the value B.

[0023] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on it, wherein the processor executes the program to implement the steps of the method described above.

[0024] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method described above.

[0025] The beneficial effects of this application are as follows:

[0026] This application provides a control method and control system for reducing the tilting of the looper trolley. The method detects the actual tension value N1 of the strip at the looper inlet and the actual tension value N2 of the strip at the looper outlet. It then determines whether the value of N1 or N2 is less than or equal to a value A. If so, it indicates an abnormality in the strip inside the looper, possibly a breakage, and the looper trolley may tilt, thus stopping the production line. If not, it calculates the deviation X of N2 relative to the set tension value N0 of the strip. If the deviation is greater than or equal to a value B, it indicates abnormal tension fluctuations in the strip, possibly due to wire rope damage, and the looper trolley may tilt, thus stopping the production line. This method reduces the occurrence of looper trolley tilting and overturning to a certain extent. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0028] Figure 1 This is a schematic diagram of the structure of the looper provided in this embodiment;

[0029] Figure 2 This is a schematic diagram of the assembly of the tension gauge roller for the strip steel provided in this embodiment.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100-Loose looper, 110-Winding motor, 120-Winding, 130-Wire rope, 140-Rope pulley, 150-Loose looper trolley, 160-Counterweight, 200-Strip steel, 300-Tension meter roller. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0036] Combination Figure 1 and Figure 2 The continuous annealing production line includes a looper 100 and a strip 200. The looper 100 includes an inlet looper and an outlet looper, both of which are vertical loopers. It mainly includes a winch motor 110, a winch 120, a wire rope 130, a pulley 140, a looper trolley 150, and a counterweight 160. The winch motor 110 is the power output device. The counterweight 160 is an iron block that reduces the load on the winch motor 110. The winch 120 is the winding device for the wire rope 130; its rotation allows for winding or unwinding. The pulley 140 is the steering device for the wire rope 130. Rollers are mounted on the looper trolley 150, through which the strip 200 passes. The wire rope 130 drags the looper trolley 150, allowing the looper 100 to store or release the strip 200.

[0037] During the use of the looper 100, the winch motor 110 rotates, causing the winch 120 to rotate, and the wire rope 130 is wound around it. The looper trolley 150 moves upward, and the strip steel 200 is continuously fed into the looper 100 to achieve the purpose of storing the strip steel 200. Conversely, the looper 100 releases the strip steel 200. The looper trolley 150 is kept in balance by the combined action of the wire rope 130 and the strip steel 200. Therefore, when a section of the wire rope 130 is damaged or the strip steel 200 breaks, it will cause uneven force on the looper trolley 150, resulting in the looper trolley 150 tilting.

[0038] Based on this, this application provides a control method for reducing the tilting of the looper trolley, applied to a continuous annealing production line. The control method includes:

[0039] S1: Detect the actual tension value N1 of the strip 200 at the inlet of the looper 100 and the actual tension value N2 of the strip 200 at the outlet of the looper 100;

[0040] The looper 100 described in this embodiment includes an inlet looper and an outlet looper. Tension gauge rollers 300 are provided at both the inlet and outlet of the looper 100. That is, the strip 200 enters the looper 100 through the tension gauge roller 300 at the inlet of the looper 100 and leaves through the tension gauge roller 300 at the outlet of the looper 100. The tension gauge rollers 300 can detect the actual tension value N1 of the strip 200 at the inlet of the looper 100 and the actual tension value N2 of the strip 200 at the outlet of the looper 100.

[0041] S2: Determine whether the value of N1 or N2 is less than or equal to the value A. If yes, stop the production line. If not, calculate the deviation X of N2 relative to the set tension value N0 of the strip 200. If the deviation X is greater than or equal to the value B, stop the production line.

[0042] Determine if the value of N1 or N2 is less than or equal to value A. If yes, it indicates an abnormality in the strip 200 within the looper 100; the tension of the strip 200 is too low, potentially leading to strip breakage, and the looper trolley 150 may tilt. Therefore, the production line must be stopped. Specifically, value A can be 3 kN. If not, calculate the deviation X of N2 relative to the set tension value N0 of the strip 200. If the deviation is greater than or equal to value B, it indicates abnormal tension fluctuation in the strip 200, possibly due to damage to the wire rope 130. The looper trolley 150 may tilt, thus requiring the production line to be stopped. This reduces the likelihood of the looper trolley 150 tilting or overturning. It should be noted that before stopping the production line, the looper trolley 150 must be allowed to descend a certain distance under inertia.

[0043] Specifically, the deviation X can be obtained according to formula 1), which is:

[0044] X=|N-N0| / N0*100Formula 1)

[0045] In some implementations, it is determined whether the actual tension value N is less than or equal to the value A. If yes, the production line is stopped; if not, the deviation X of the actual tension value N relative to the set tension value N0 of the strip 200 is calculated. If the deviation is greater than or equal to the value B, the production line is stopped. Specifically, this includes:

[0046] Determine whether the actual tension value N is less than or equal to the value A. If yes, stop the production line after a delay. If not, calculate the deviation X of the actual tension value N relative to the set tension value N0 of strip 200. If the deviation is greater than or equal to the value B, stop the production line after a delay.

[0047] Because tension fluctuations can occur momentarily during the normal acceleration and deceleration of strip 200, but this situation lasts for a very short time, in order to more accurately determine whether the tension fluctuation of strip 200 is caused by a break in strip 200 or damage to wire rope 130, when it is determined that the actual tension value N is less than or equal to the value A or the deviation X is greater than or equal to the value B, the production line should be stopped after a certain period of time.

[0048] In some implementations, if the deviation is greater than or equal to the value B, the production line is stopped after a delay, specifically including:

[0049] If the deviation is greater than or equal to the value B, the production line will be stopped after a delay time t1.

[0050] If the deviation is greater than or equal to the value C, the production line will be stopped after a delay time t2.

[0051] Where C > B, t2 < t1. That is, the smaller the deviation X, the longer the delay time needs to be. Specifically, the value B can be 30%, the value C can be 50%, and t1 = 2.5s, t2 = 1s.

[0052] Based on the same inventive concept, this application also provides a control system for reducing the tilt of the looper trolley, applied to the control method described above. The control system includes:

[0053] Detection module: used to detect the actual tension value N1 of the strip 200 at the inlet of the looper 100 and the actual tension value N2 of the strip 200 at the outlet of the looper 100;

[0054] Judgment module: Used to determine whether the value of N1 or N2 is less than or equal to the value A;

[0055] Calculation module: used to calculate the deviation X of N2 relative to the set tension value N0 of the strip 200;

[0056] Execution module: used to stop the production line when the value of N1 or N2 is less than or equal to the value A; and to stop the production line when the deviation X of N2 relative to the set tension value N0 of the strip 200 is greater than or equal to the value B.

[0057] Based on the same inventive concept, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on it, wherein the processor executes the program to implement the steps of the method described above.

[0058] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described above.

[0059] This application provides a control method and control system for reducing the tilting of the looper trolley. The method detects the actual tension value N1 of the strip 200 at the looper 100 inlet and the actual tension value N2 of the strip 200 at the looper 100 outlet. It then determines whether the value of N1 or N2 is less than or equal to the value A. If so, it indicates an abnormality in the strip 200 within the looper 100, possibly indicating a breakage, and the looper trolley 150 may tilt, thus stopping the production line. If not, it calculates the deviation X of N2 relative to the set tension value N0 of the strip 200. If the deviation is greater than or equal to the value B, it indicates abnormal tension fluctuations in the strip 200, possibly due to damage to the wire rope 130, and the looper trolley 150 may tilt, thus stopping the production line. This method reduces the occurrence of tilting or overturning of the looper trolley 150 to a certain extent.

[0060] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A control method for reducing the tilting of a loop car, characterized by, The control method is applied to a continuous annealing production line, the continuous annealing production line comprises a strip steel and a loop, the strip steel passes through the loop, the loop comprises a loop trolley, the loop trolley is used for storing or releasing the strip steel, and the control method comprises the following steps: detecting an actual tension value N1 of the strip steel at a loop inlet and an actual tension value N2 of the strip steel at a loop outlet; determining whether the value of N1 or N2 is less than or equal to 3KN, if yes, stopping the production line; if not, calculating a deviation X of N2 relative to a set tension value N0 of the strip steel, if the deviation X is greater than or equal to 30%, stopping the production line.

2. The control method of reducing the tilt of the loop car according to claim 1, characterized by, The determination of whether the actual tension value N is less than or equal to the numerical value 3KN, if yes, stopping the production line; if not, calculating the deviation X of the actual tension value N relative to the set tension value N0 of the strip steel, if the deviation is greater than or equal to the numerical value 30%, stopping the production line, specifically comprising: determining whether the actual tension value N is less than or equal to the numerical value 3KN, if yes, delaying for a period of time and then stopping the production line; if not, calculating the deviation X of the actual tension value N relative to the set tension value N0 of the strip steel, if the deviation is greater than or equal to the numerical value 30%, delaying for a period of time and then stopping the production line.

3. The control method of reducing the tilt of the loop car according to claim 2, characterized by, The stopping of the production line after the deviation is greater than or equal to 30% specifically comprises: if the deviation is greater than or equal to 30%, delaying for 2.5s and then stopping the production line; if the deviation is greater than or equal to 50%, delaying for 1s and then stopping the production line.

4. The control method of reducing the tilt of the loop car according to claim 1, characterized by, The loop inlet and the loop outlet are each provided with a tension meter roller, the tension meter roller is used for detecting the actual tension value N1 of the strip steel at the loop inlet and the actual tension value N2 of the strip steel at the loop outlet.

5. A control system for reducing the tilt of a loop car, characterized by, The control system is applied to the control method according to any one of claims 1-4, and the control system comprises: a detection module, which is used for detecting the actual tension value N1 of the strip steel at the loop inlet and the actual tension value N2 of the strip steel at the loop outlet; a determination module, which is used for determining whether the value of N1 or N2 is less than or equal to 3KN; a calculation module, which is used for calculating the deviation X of N2 relative to the set tension value N0 of the strip steel; an execution module, which is used for stopping the production line when the value of N1 or N2 is less than or equal to 3KN, and stopping the production line when the deviation X of N2 relative to the set tension value N0 of the strip steel is greater than or equal to 30%.

6. An electronic device, comprising: The computer program is stored on the memory and is executed by the processor to implement the steps of the method according to any one of claims 1-4.

7. A computer readable storage medium characterized in that, The computer program is stored on the memory and is executed by the processor to implement the steps of the method according to any one of claims 1-4.

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