Oxygen lance system lifting speed anomaly detection method

Abstract

The invention discloses an oxygen lance system lifting speed anomaly detection method. The method comprises the following steps that 1, an oxygen lance absolute value encoder is installed; 2, calibrating the speed of the encoder; 3, the operation distance of the oxygen lance in a fixed period is calculated through a program, namely the lifting speed of the oxygen lance is detected and monitored in real time; 4, the speed of the oxygen lance is judged in real time, and when the speed is detected to be abnormal, whether lance falling occurs or not is judged through a program; 5, when it is detected that the speed of the oxygen lance is abnormal, the program immediately starts an oxygen lance stop protection function; and step 6, detecting that the speed of the oxygen lance is abnormal, immediately stopping the lifting of the oxygen lance, and sending an alarm signal to remind maintenance personnel and operators to check. The invention relates to the field of oxygen lance system use, in particular to an oxygen lance system lifting speed anomaly detection method.

Description

Technical Field

[0001] The invention relates to the application field of oxygen lance systems, and in particular to a method for detecting abnormal lifting speed of oxygen lance systems. Background Art

[0002] There are uncontrollable factors in the oxygen lance during the lifting process, such as inverter out of control, brake failure, reducer failure, etc., which may cause sliding or falling failures. When operating the oxygen lance, the operator cannot accurately predict whether the lifting process of the oxygen lance is normal descent or the oxygen lance is sliding or falling. The operator needs to react and judge the process and time when the oxygen lance stops operating abnormally. By the time the operator finds it, the oxygen lance may have slid a long distance or fallen to the lowest point. Especially when there is molten steel in the furnace during the smelting process, the oxygen lance may slide or fall, which poses a huge safety risk of burning the lance and leaking water into the furnace. The program automatically detects and judges the abnormal speed of the oxygen lance lifting and lowering, and automatically stops the oxygen lance lifting and lowering.

[0003] The oxygen lance is not affected within the normal speed. When the oxygen lance speed is detected to be abnormal, the oxygen lance is immediately stopped through the control program, and an alarm is issued to remind the operator and maintenance personnel to organize the handling to avoid serious accidents of the oxygen lance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to prevent the oxygen lance from sliding down or falling down during the lifting process of the oxygen lance, especially when there is molten steel in the furnace during the smelting process, which poses a huge safety risk of burning the lance and leaking water into the furnace. The program automatically detects and determines the abnormal lifting speed of the oxygen lance, and automatically stops the lifting of the oxygen lance.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows: The present invention is a method for detecting abnormal lifting speed of an oxygen lance system, comprising the following steps: Step 1: Install the oxygen gun absolute encoder; Step 2: Encoder speed calibration; Step 3: The program calculates the distance the oxygen lance runs within a fixed period, i.e., monitors the oxygen lance lifting speed in real time; Step 4: determine the oxygen gun speed in real time. If an abnormal speed is detected, the program determines whether the gun has dropped. Step 5: When the oxygen lance speed is detected to be abnormal, the program immediately starts the oxygen lance stop protection function; Step 6: If an abnormal speed of the oxygen lance is detected, the oxygen lance lifting and lowering will stop immediately and an alarm signal will be issued to remind the maintenance personnel and operators to check.

[0006] Furthermore, the distance that the oxygen lance descends or ascends within a fixed period is calculated by the PLC program.

[0007] Furthermore, if the distance moved by the oxygen lance within a fixed period of time exceeds the normal distance by 1.4 to 1.6 times, it is determined that the oxygen lance has fallen.

[0008] Furthermore, the oxygen lance height is converted into speed, and the speed is automatically judged, abnormalities are detected, and alarms and interlocks are issued.

[0009] Furthermore, when the speed of the oxygen gun is abnormal, the oxygen gun lifting action is automatically stopped, and when the handle returns to zero, the oxygen gun is automatically reset and the speed of the oxygen gun is re-detected.

[0010] The beneficial effects achieved by the present invention using the above structure are as follows: The basic principle of the present invention is to detect the lifting speed of the oxygen gun through the oxygen gun encoder, and calculate the distance of the oxygen gun's descent or ascent within a fixed period through the PLC program. If the distance the oxygen gun moves within the fixed period exceeds 1.5 times the normal distance, it is judged that the oxygen gun has fallen, and the program immediately blocks the action of the oxygen gun and does not allow it to move again. The oxygen gun is protected from falling. An alarm is issued to remind the operator and maintenance personnel to organize the treatment to avoid the occurrence of serious accidents with the oxygen gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 An encoder device and a configuration program diagram are added to the oxygen gun proposed by the present invention; Figure 2 A is a diagram of the oxygen lance height detection procedure proposed by the present invention; Figure 3 It is the oxygen lance height detection program diagram B proposed by the present invention; Figure 4 The present invention proposes a procedure diagram for detecting abnormalities, issuing alarms and chain reactions; Figure 5 This is a procedure diagram for re-detecting the oxygen lance speed proposed by the present invention. DETAILED DESCRIPTION Example 1

[0012] like Figure 1~Figure 5 As shown, the present invention is a method for detecting abnormal lifting speed of an oxygen lance system, comprising the following steps: Step 1: Install the oxygen gun absolute encoder; Step 2: Encoder speed calibration; Step 3: The program calculates the distance the oxygen lance runs within a fixed period, i.e., monitors the oxygen lance lifting speed in real time; Step 4: determine the oxygen gun speed in real time. If an abnormal speed is detected, the program determines whether the gun has dropped. Step 5: When the oxygen lance speed is detected to be abnormal, the program immediately starts the oxygen lance stop protection function; Step 6: If an abnormal speed of the oxygen lance is detected, the oxygen lance lifting and lowering will stop immediately and an alarm signal will be issued to remind the maintenance personnel and operators to check.

[0013] The PLC program calculates the distance that the oxygen lance descends or rises within a fixed period. If the distance the oxygen lance moves within the fixed period exceeds the normal distance by 1.5 times, it is judged that the oxygen lance has fallen. The oxygen lance height is converted into speed, and the speed is automatically judged. Abnormalities are detected and alarms and interlocks are issued. When the oxygen lance speed is abnormal, the oxygen lance lifting action is automatically stopped. When the handle returns to zero, the oxygen lance automatically resets and the oxygen lance speed is re-detected. Example 2

[0014] like Figure 1~Figure 5 As shown, the present invention is a method for detecting abnormal lifting speed of an oxygen lance system, comprising the following steps: Step 1: Install the oxygen gun absolute encoder; Step 2: Encoder speed calibration; Step 3: The program calculates the distance the oxygen lance runs within a fixed period, i.e., monitors the oxygen lance lifting speed in real time; Step 4: determine the oxygen gun speed in real time. If an abnormal speed is detected, the program determines whether the gun has dropped. Step 5: When the oxygen lance speed is detected to be abnormal, the program immediately starts the oxygen lance stop protection function; Step 6: If an abnormal speed of the oxygen lance is detected, the oxygen lance lifting and lowering will stop immediately and an alarm signal will be issued to remind the maintenance personnel and operators to check.

[0015] The PLC program calculates the distance that the oxygen lance descends or rises within a fixed period. If the distance the oxygen lance moves within the fixed period exceeds the normal distance by 1.4 times, it is judged that the oxygen lance has fallen. The oxygen lance height is converted into speed, and the speed is automatically judged. Abnormalities are detected and alarms and interlocks are issued. When the oxygen lance speed is abnormal, the oxygen lance lifting action is automatically stopped. When the handle returns to zero, the oxygen lance automatically resets and the oxygen lance speed is re-detected. Example 3

[0016] like Figure 1~Figure 5 As shown, the present invention is a method for detecting abnormal lifting speed of an oxygen lance system, comprising the following steps: Step 1: Install the oxygen gun absolute encoder; Step 2: Encoder speed calibration; Step 3: The program calculates the distance the oxygen lance runs within a fixed period, i.e., monitors the oxygen lance lifting speed in real time; Step 4: determine the oxygen gun speed in real time. If an abnormal speed is detected, the program determines whether the gun has dropped. Step 5: When the oxygen lance speed is detected to be abnormal, the program immediately starts the oxygen lance stop protection function; Step 6: If an abnormal speed of the oxygen lance is detected, the oxygen lance lifting and lowering will stop immediately and an alarm signal will be issued to remind the maintenance personnel and operators to check.

[0017] The PLC program calculates the distance that the oxygen lance descends or rises within a fixed period. If the distance the oxygen lance moves within the fixed period exceeds the normal distance by 1.6 times, it is judged that the oxygen lance has fallen. The oxygen lance height is converted into speed, and the speed is automatically judged. Abnormalities are detected and alarms and interlocks are issued. When the oxygen lance speed is abnormal, the oxygen lance lifting action is automatically stopped. When the handle returns to zero, the oxygen lance automatically resets and the oxygen lance speed is re-detected.

[0018] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for detecting abnormal lifting speed of an oxygen lance system, characterized in that: The steps include: Step 1: Install the oxygen gun absolute encoder; Step 2: Encoder speed calibration; Step 3: The program calculates the distance the oxygen lance runs within a fixed period, i.e., monitors the oxygen lance lifting speed in real time; Step 4: determine the oxygen gun speed in real time. If an abnormal speed is detected, the program determines whether the gun has dropped. Step 5: When the oxygen lance speed is detected to be abnormal, the program immediately starts the oxygen lance stop protection function; Step 6: If an abnormal speed of the oxygen lance is detected, the oxygen lance lifting and lowering will stop immediately and an alarm signal will be issued to remind the maintenance personnel and operators to check.

2. The method for detecting abnormal lifting speed of an oxygen lance system according to claim 1, characterized in that: The PLC program calculates the distance the oxygen gun descends or rises within a fixed period.

3. The method for detecting abnormal lifting speed of an oxygen lance system according to claim 2, characterized in that: If the distance the oxygen lance moves within a fixed period of time exceeds the normal distance by 1.4-1.6 times, it is judged that the oxygen lance has fallen.

4. The method for detecting abnormal lifting speed of an oxygen lance system according to claim 3, characterized in that: The oxygen gun height is converted into speed, and the speed is automatically determined, abnormalities are detected, and alarms and interlocks are issued.

5. The method for detecting abnormal lifting speed of an oxygen lance system according to claim 4, characterized in that: When the oxygen gun speed is abnormal, the oxygen gun lifting action will be automatically stopped. When the handle returns to zero, the oxygen gun will automatically reset and re-detect the oxygen gun speed.

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