A method for avoiding production accidents caused by uncut slab castings

Abstract

The application relates to a method for avoiding production accidents caused by uncutting of slab casting, and relates to the technical field of metallurgy. The method comprises the following steps: step 1, distance measurement; step 2, analysis of the time required by the casting blank before reaching the rotating disc after the system displays that the cutting is completed; step 3, taking the signal point displayed by the system that the cutting is completed; step 4, taking the signal point displayed by the system that the casting blank reaches the rotating disc; step 5, establishment of the uncutting alarm logic of the casting blank by taking the signal point that the cutting is completed and the signal point that the casting blank reaches the rotating disc; step 6, judgment of whether the cutting of the casting blank is completed according to the logic and transmission to the centralized control system; step 7, if it is judged that the cutting of the casting blank is not completed, then sound and light alarms are sent out by the centralized control; and step 8, after receiving the alarm information, the centralized control operator timely carries out manual intervention and supplementary cutting, the method can automatically identify and send out alarms in the case that the cutting system displays that the cutting of the casting blank is completed but the actual cutting is not completed, so that manual intervention is realized, non-planned shutdown is prevented, and the production is effectively ensured to proceed smoothly.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for avoiding production accidents caused by uncutting of slab casting blank, and relates to the technical field of slab production. BACKGROUND

[0002] In a steel mill, the casting blank produced by the slab continuous casting machine needs to be cut after being pulled out of the sector. Currently, personnel integration and entering the centralized control center are the trend of the whole country. However, in the process of entering the centralized control center, improving operation efficiency, improving operation ability, improving equipment level and promoting the digital transformation of continuous casting, there is a thorny problem in the cutting of slab casting blank. Since the personnel in the centralized control center need to pay attention to more points, if the casting blank is not cut off, the personnel will not pay attention to it, which will lead to a significant speed reduction or even unplanned shutdown accident. In view of the above problems, a method for avoiding production accidents caused by uncutting of slab casting blank is developed. SUMMARY

[0003] The present application aims to overcome the defects or deficiencies in the prior art, and provides a method for avoiding production accidents caused by uncutting of slab casting blank, which can automatically identify and issue an alarm when the cutting system displays that the casting blank has been cut but the actual cutting has not been completed, so as to intervene manually, prevent unplanned shutdown, and effectively ensure smooth production.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: it comprises the following steps: step 1, distance measurement;

[0005] Step 2, analyze the time required for the casting blank to reach the turntable after the system displays that the cutting is completed;

[0006] Step 3, take the signal point displayed by the system that the cutting is completed;

[0007] Step 4, take the signal point displayed by the system that the casting blank reaches the turntable;

[0008] Step 5, establish the uncutting alarm logic of the casting blank by taking the signal point of the completed cutting and the signal point of the casting blank reaching the turntable;

[0009] Step 6, determine whether the cutting of the casting blank is completed according to the logic and transmit it to the centralized control system;

[0010] Step 7, if it is determined that the cutting of the casting blank is not completed, issue an audible and visual alarm in the centralized control;

[0011] Step 8, after receiving the alarm information, the centralized control operator timely intervenes manually and performs additional cutting.

[0012] After adopting the above technical solution, the beneficial effect of the present invention is that it can automatically identify and issue an alarm when the cutting system shows that the billet has been cut but the actual cutting is not completed, thereby allowing manual intervention to prevent unplanned shutdowns and effectively ensure smooth production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a schematic diagram of the method steps of the present invention;

[0015] Figure 2 It is a schematic diagram of the alarm logic flow of the present invention. DETAILED DESCRIPTION

[0016] See Figure 1-Figure 2 As shown, the technical solution adopted in this specific embodiment is: Step 1, distance measurement, measuring the distance between the billet and the turntable after cutting. In this embodiment, the distance between the billet and the turntable is 15m. First, only after measuring the subsequent travel distance of the billet can the subsequent calculation and alarm analysis and judgment be carried out;

[0017] Step 2: Analyze the time it takes for the billet to reach the turntable after the system indicates that the billet has been cut. Normally, the roller will rotate rapidly after the billet is cut, and it only takes 38 seconds to complete 15 meters. The system will not trigger an alarm for the billet process within the normal travel time. However, when the billet is not cut, this part of the billet is pulled by the sector billet and the travel speed is the same as the pulling speed of the straightening machine. It will not follow the translation roller and it takes at most 10 minutes to complete 15 meters. This abnormal time data is recorded and transmitted to the system display;

[0018] Step 3: Take the signal point where the system shows that the cutting is completed, lift the cutting completion block of the fire cutting machine, and trigger the upper limit switch. The signal point received and transmitted to the fire cutting machine PLC is the cutting completion signal point, and this signal signal recording point is the front-end signal point;

[0019] Step 4: Take the signal point displayed by the system when the billet arrives in front of the turntable. A laser device is set in front of the turntable. When the billet blocks the laser and the receiving device cannot receive the laser, a signal point will be triggered. That is, the signal point is triggered when the laser device in front of the turntable does not receive the signal. This signal point is the signal point when the billet arrives in front of the turntable. This signal point is the back-end signal point, and is used together with the front-end signal point to calculate the duration.

[0020] Step 5, the signal point of the cutting completed casting blank and the signal point of the casting blank before reaching the rotary table are combined to establish the logic of the casting blank cutting alarm, and the alarm logic is as follows: after receiving the signal of the cutting completion, if the time is greater than 45s and the signal of the casting blank before reaching the rotary table is not received, it is considered that the casting blank is not cut off;

[0021] Step 6, according to the logic, whether the cutting of the casting blank is completed is determined and the signal is transmitted to the control system, when it is determined that the cutting of the casting blank is not completed, the signal is immediately transmitted to the operation interface of the control system;

[0022] Step 7, if it is determined that the cutting of the casting blank is not completed, the sound and light alarm is sent out in the control, the sound and light alarm device is added to the control and is interlocked with the system, when it is determined by the system that the cutting of the casting blank is not completed, the sound and light alarm of "the cutting of the casting blank is not completed" is sent out in the control operation room through the control system, the operator can discover the casting blank which is not cut off in time through the sound and light alarm while monitoring the multi-window, and the occurrence of the accident caused by the lack of effective determination prompt in the multi-window monitoring is prevented;

[0023] Step 8, after receiving the alarm information, the control operator timely intervenes and cuts, after the sound and light alarm of "the cutting of the casting blank is not completed" is discovered by the control operator, the actual situation is observed in time, if the cutting of the casting blank is not completed, the cutting is cut in time through the manual operation of the cutting machine, and the expansion of the accident is prevented.

[0024] The above is only used to explain the technical scheme of the present application but not limit the present application, other modifications or equivalent replacements of the technical scheme of the present application made by the ordinary skilled in the art should be covered in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the present application.

Claims

1. A method for avoiding production accidents caused by uncut slab castings, characterized by: It includes the following steps: Step 1: Measure the distance from the slab cutting to the turntable to be 15m; Step 2: Analyze the time it takes for the billet to reach the turntable after the system indicates that the billet has been cut. Normally, the roller will rotate rapidly after the billet is cut, and it only takes 38 seconds to complete 15 meters. The system will not trigger an alarm for the billet process within the normal travel time. However, when the billet is not cut, this part of the billet is pulled by the sector billet and the travel speed is the same as the pulling speed of the straightening machine. It will not follow the translation roller and can take up to 10 minutes to complete 15 meters. This abnormal time data is recorded and transmitted to the system display. Step 3: Take the signal point where the system shows that the cutting is completed; Step 4: Take the signal point before the billet reaches the turntable as displayed by the system; Step 5: Establishing the alarm logic of the billet not being cut by combining the signal point of the cutting completion with the signal point before the billet reaches the turntable; Step 6: Determine whether the billet is cut according to the logic and transmit it to the centralized control system; Step 7: If it is determined that the billet cutting is not completed, an audible and visual alarm is issued in the centralized control; Step 8: After receiving the alarm information, the centralized control operator will manually intervene and make up for the loss in time; The uncut alarm logic in step 5 is: starting from the time when the signal of cutting completion is received, if the signal of the billet reaching the turntable is not received after a time of more than 45 seconds, it is considered that the billet has not been cut.

2. The method for avoiding production accidents caused by uncut slabs according to claim 1, characterized in that: The signal point of cutting completion in step 3 is the signal point at which the fire cutting machine completes cutting and the pressing block is lifted, triggering the upper limit switch and then receiving and transmitting it to the fire cutting machine PLC.

3. The method for avoiding production accidents caused by uncut slabs according to claim 1, characterized in that: The signal point in step 4 when the ingot reaches the turntable is the trigger signal point when the laser device in front of the turntable does not receive any signal.

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