Horizontal loop hoist steel wire rope slip judgment and control method

Abstract

The present application relates to the technical field of auxiliary equipment of steel production line, and particularly discloses a horizontal loop hoist steel wire rope slip judgment and control method, a control system acquires actual speed Vact of loop hoist operation and reference speed Vref in real time, and a speed deviation ΔV=Vact-Vref is obtained from the actual speed and the reference speed; the speed deviation ΔV obtained in step S1 is compared with a tension control compensation speed Vtech in the control system to perform early warning grading judgment; in the early warning grading judgment in step S2, position calibration judgment is executed, that is, slip judgment is executed, and whether to enter a slip control intervention process is judged according to a deviation between an actual calibration value of the loop trolley position and a target value of the loop trolley position acquired by the control system; the present application can accurately and timely find that the hoist steel wire rope appears slip phenomenon, automatically intervene in control, timely eliminate the slip trend, stabilize the equipment operation, and provide protection for stable equipment operation.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for steel production lines, specifically to a method for judging and controlling slippage of a horizontal loop winch wire rope. Background Technology

[0002] Slippage of the wire rope in a horizontal looper hoist mainly involves insufficient adhesion between the wire rope and the sheave in the friction drive system, leading to relative slippage and subsequently causing abnormal unit operation or shutdown. In continuous production units (such as hot-dip galvanizing, annealing, and pickling lines), grease accumulates on the surface of the wire rope after long-term operation, significantly reducing its friction coefficient with the sheave and making it prone to slippage. Horizontal loopers use multiple independent transmission devices, with the wire rope wrapped around each drive wheel, forming a multi-point friction transmission. Once the friction at any point is insufficient, it can trigger a chain of slippage. Fluctuations in parameters such as unit load, strip tension, and speed lead to uneven tension distribution in the wire rope, with local tension exceeding the static friction limit. In the past, reliance on manual periodic application of anti-slip powder was insufficient to respond in real time to sudden slippage, and untimely handling could easily cause shutdowns or a decline in product quality.

[0003] Existing technologies, such as the method for preventing slippage of horizontal looper wire ropes disclosed in patent publication number CN115254990A, monitor the rotational speed and torque of the wire rope and pulley in the looper to determine whether slippage exists between the wire rope and pulley. However, the variables used (rotational speed and torque) are singular and direct data, without extracting variable features, resulting in poor accuracy. Similar technical solutions do not clearly define the method for determining slippage. When slippage occurs during production line operation, simply applying anti-slip powder to the wire rope online using an automatic powder coating device to mitigate the slippage cannot provide prediction or timely detection of slippage trends, leading to delays in handling slippage problems and impacting maintenance efficiency. Therefore, it is necessary to design a method for judging and controlling slippage of horizontal looper hoist wire ropes to address the problems of low maintenance efficiency and poor equipment stability caused by the lack of prediction of wire rope slippage in existing technologies. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a method for judging and controlling slippage of horizontal loop winch wire rope. Through automatic slippage early warning classification, slippage judgment (slippage re-verification), and slippage control intervention, the method can promptly detect slippage trends and automatically engage slippage control, effectively avoiding serious equipment damage. The countermeasures are relatively more reasonable, intelligent, and effective.

[0005] The technical solution adopted by this invention to solve its technical problem is: a method for judging and controlling slippage of a horizontal slip-on hoist wire rope, comprising the following steps:

[0006] S1. The control system acquires the actual speed Vact and reference speed Vref of the looper hoist in real time, and obtains the speed deviation value ΔV=Vact-Vref from the actual speed and reference speed.

[0007] S2. Perform early warning classification judgment by comparing the speed deviation value ΔV obtained in step S1 with the tension control compensation speed Vtech in the control system.

[0008] S3. In the early warning classification judgment in step S2, the execution position calibration judgment is the execution position calibration slippage judgment, and the deviation between the actual calibration value of the looper trolley position and the target value of the looper trolley position obtained by the control system determines whether to enter the slippage control intervention process.

[0009] Specifically, in step S2, the warning level judgment is based on the calculated slippage amount, where slippage amount T = (ΔV - Vtech) / Vtech.

[0010] Specifically, the classification of warning levels includes:

[0011] When T≤25%, it is classified as Grade D, which is an acceptable amount;

[0012] When 25% < T ≤ 50%, it is classified as Grade C, and on-site inspection is recommended.

[0013] When 50% < T ≤ 80%, it is judged as Grade B, and the location calibration judgment is performed.

[0014] When 80% < T ≤ 100%, it is judged as Grade A, and the position calibration judgment and emergency shutdown are recommended.

[0015] Specifically, in step S3, the warning classification judgment is at level A and level B, that is, when 50% < T ≤ 100%, the position calibration slippage judgment is performed.

[0016] Specifically, if the deviation between the actual calibrated position of the looper trolley in step S3 and the target position value of the looper trolley obtained by the control system is greater than 50cm, the next slippage control intervention process will be executed; if the deviation is less than 50cm, the slippage control intervention process will not be executed.

[0017] Specifically, the steps of the slippage control intervention process in step S3 are as follows:

[0018] S31. The control system automatically adjusts the diameter of the rope wheel of the horizontal loop winch, with a single adjustment amount of 3mm.

[0019] S32. Repeat steps S1-S3 for judging the slippage of the horizontal loop winch wire rope.

[0020] S33. Continue until the slippage warning is eliminated, then end the slippage control process.

[0021] The present invention has the following beneficial effects:

[0022] The present invention provides a method for judging and controlling slippage of horizontal loop winch wire rope. This method can accurately and promptly detect slippage of the winch wire rope. The control system automatically identifies the slippage warning level, performs a slippage judgment (re-verification) based on the level, and then eliminates the slippage trend in a timely manner through automatic intervention control, thereby stabilizing equipment operation and ensuring stable equipment operation. Attached Figure Description

[0023] Figure 1 This is a flowchart of the method for judging and controlling slippage of horizontal loop winch wire rope. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1 As shown, a method for judging and controlling slippage of a horizontal slip-on hoist wire rope includes the following steps:

[0026] (1) The control system acquires the actual speed Vact and reference speed Vref of the looper hoist in real time, and obtains the speed deviation value ΔV=Vact-Vref from the actual speed and reference speed;

[0027] (2) The speed deviation value ΔV obtained in step (1) is compared with the tension control compensation speed Vtech in the system for early warning classification judgment, as shown in Table 1. The slippage amount T = (ΔV-Vtech) / Vtech. When T≤25%, it is judged as Grade D, which is acceptable. When 25%<T≤50%, it is judged as Grade C, and on-site inspection is recommended. When 50%<T≤80%, it is judged as Grade B, and position calibration judgment is performed. When 80%<T≤100%, it is judged as Grade A, and position calibration judgment and emergency shutdown are recommended.

[0028] Table 1. Slippage Warning Level Determination Table

[0029] Serial Number Judgment basis Warning Level Handling method 1 T≤25% Class D Acceptable 2 25%＜T≤50% Class C On-site inspection is recommended. 3 50%＜T≤80% Grade B Execution location determination judgment 4 80%＜T≤100% Grade A Execute location calibration judgment and recommend emergency shutdown.

[0030] (3) When the warning level in step (2) is A or B (50% < T ≤ 100%), the position calibration slippage judgment (re-verification) is performed. If the actual calibration value of the looper trolley position deviates from the target position value obtained at level L1 by more than 50cm (re-verification fails), the next slippage control intervention process is executed. If the deviation value is less than 50cm, the slippage control intervention process is not executed.

[0031] The slippage control intervention process includes the following steps:

[0032] (1) The control system automatically adjusts the diameter of the rope wheel, with a single adjustment amount of 3mm;

[0033] (2) Repeatedly execute the steps (1)-(3) for judging the slippage of the horizontal loop winch wire rope;

[0034] (3) The slip control process ends when the slip warning is eliminated.

[0035] This invention acquires in real time the actual operating speed, reference speed, tension control compensation speed Vtech, position calibration value, and position target value of the loop winch; it derives the speed deviation value ΔV from the actual speed and reference speed, compares it with the tension control compensation speed Vtech, and derives a slippage prediction method for the wire rope slippage warning level, making a warning level judgment; based on the warning level judgment result, it performs a position calibration slippage judgment, and if it fails, it executes slippage control, protecting the system by adjusting the rope sheave diameter and cyclically judging the slippage situation through a slippage control intervention method.

[0036] This invention is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

[0037] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A method for judging and controlling slippage of a horizontal slip-on hoist wire rope, characterized in that, Includes the following steps: S1. The control system acquires the actual speed Vact and reference speed Vref of the looper hoist in real time, and obtains the speed deviation value ΔV=Vact-Vref from the actual speed and reference speed. S2. Perform early warning classification judgment by comparing the speed deviation value ΔV obtained in step S1 with the tension control compensation speed Vtech in the control system. S3. In the early warning classification judgment in step S2, the execution position calibration judgment is the execution position calibration slippage judgment, and the deviation between the actual calibration value of the looper trolley position and the target value of the looper trolley position obtained by the control system determines whether to enter the slippage control intervention process.

2. The method for judging and controlling slippage of horizontal loop winch wire rope according to claim 1, characterized in that, In step S2, the warning level is determined by the calculated slippage amount, where slippage amount T = (ΔV - Vtech) / Vtech.

3. The method for judging and controlling slippage of horizontal loop winch wire rope according to claim 2, characterized in that, The classification of warning levels includes: When T≤25%, it is classified as Grade D, which is an acceptable amount; When 25% < T ≤ 50%, it is classified as Grade C, and on-site inspection is recommended. When 50% < T ≤ 80%, it is judged as Grade B, and the location calibration judgment is performed. When 80% < T ≤ 100%, it is judged as Grade A, and the position calibration judgment and emergency shutdown are recommended.

4. The method for judging and controlling slippage of horizontal loop winch wire rope according to claim 3, characterized in that, In step S3, the warning classification judgment is at level A and level B, that is, when 50% < T ≤ 100%, the position calibration slippage judgment is performed.

5. The method for judging and controlling slippage of horizontal loop winch wire rope according to claim 1, characterized in that, If the deviation between the actual calibrated position of the looper trolley and the target position value of the looper trolley obtained by the control system is greater than 50cm in step S3, the next slippage control intervention process will be executed; if the deviation is less than 50cm, the slippage control intervention process will not be executed.

6. The method for judging and controlling slippage of horizontal loop winch wire rope according to claim 1, characterized in that, The specific steps of the slippage control intervention process in step S3 are as follows: S31. The control system automatically adjusts the diameter of the rope wheel of the horizontal loop winch, with a single adjustment amount of 3mm. S32. Repeat steps S1-S3 for judging the slippage of the horizontal loop winch wire rope. S33. Continue until the slippage warning is eliminated, then end the slippage control process.

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