Argon oxygen decarburization (AOD) rocking furnace chain protection improvement system and method

Abstract

The invention relates to the technical field of AOD (Argon Oxygen Decarburization) rocking furnaces, and discloses an AOD rocking furnace chain protection improvement system and method.The AOD rocking furnace chain protection improvement system comprises a limiting marker post, a proximity switch and an encoder, and the limiting marker post is fixed on a rotating shaft barrel of an AOD rocking furnace; the proximity switch is used in cooperation with the limiting marker post, the proximity switch is right opposite to the backward tilting limit position of the AOD rocking furnace, and when the furnace body of the AOD rocking furnace tilts backwards to the limit position, the limiting marker post triggers the proximity switch so as to send a signal to the control system. The encoder is connected with channel steel welded to the inner side of a port of the rotating shaft cylinder through a spring coupling, and an output shaft of the encoder is coaxial with the rotating shaft cylinder. When the furnace body inclines backwards to reach a preset limit position, the limiting marker post triggers the proximity switch, the proximity switch sends a signal to the control system, when the encoder signal is wrong or missing, the linkage protection mechanism is started, further inclination of the furnace body is stopped through the signal of the proximity switch, and safety measures are taken.

Description

Technical Field

[0001] The invention belongs to the technical field of AOD shaking furnaces, and in particular relates to an improved system and method for interlocking protection of an AOD shaking furnace. Background Art

[0002] In the current AOD furnace tilting operation system, the encoder is a key component for monitoring the tilt angle of the furnace body, and its reliability is crucial to the safe operation of the entire system.

[0003] However, in the existing technology, the encoder has the problem of failure, which may lead to serious production accidents. Specifically, when the AOD furnace body swings back too far, due to the failure of the encoder, the air pipe of the air gun may be blocked and leak, or even the universal joint may be damaged. This failure will cause the furnace air gun to lose its protective gas, thereby increasing the risk of furnace penetration. In serious cases, it may damage the charging car track, making it impossible to carry out the charging operation behind the furnace, and ultimately causing the furnace to stop production.

[0004] The existing technical defects are that the failure of the encoder is not monitored and responded to in a timely and effective manner, and there is a lack of sufficient interlocking protection mechanism to prevent excessive tilting of the furnace and related safety accidents. This not only threatens the safety of operators, but also seriously affects production efficiency and the economic benefits of the enterprise.

[0005] In order to solve these problems, an improved AOD furnace interlocking protection system and method are proposed. The improved AOD furnace interlocking protection system and method improve the automatic control level of the system by adding a limiter to the furnace tilt encoder and directly introducing the furnace body rear limit into the program. In this way, when the signal of the furnace tilt encoder is erroneous or missing, the furnace body rear limit can quickly start the interlocking protection, effectively reduce human operation errors, and significantly improve the safety of the furnace. Summary of the invention

[0006] The present invention aims to solve the technical problem that the failure of the encoder in the above-mentioned prior art is not monitored and dealt with in a timely and effective manner, and there is a lack of sufficient interlocking protection mechanism to prevent excessive tilting of the furnace body and related safety accidents.

[0007] To achieve the above object, the present invention provides the following technical solutions: An improved AOD shaking furnace interlocking protection system, comprising: Limiting rod: the limiting rod is installed and fixed on the rotating shaft of the AOD shaking furnace; Proximity switch, proximity card and limit bar are used together. The proximity switch is directly opposite to the limit position of the AOD rocking furnace backward tilting. When the AOD rocking furnace body backward tilting reaches the limit position, the limit bar triggers the proximity switch, thereby sending a signal to the control system. Encoder: The encoder is connected to the channel steel welded on the inner side of the rotating shaft tube port through a spring coupling, and the output shaft of the encoder is coaxial with the rotating shaft tube.

[0008] Preferably, the encoder is mounted on an L-shaped support A, the L-shaped support A is fixed on the top of a U-shaped steel plate, and the U-shaped steel plate is fixed on the top of two U-shaped steel plates.

[0009] Preferably, an L-shaped support B is fixedly provided on one side of one of the steel plates, and the proximity switch is installed on the L-shaped support B.

[0010] An improved method for an AOD shaking furnace interlocking protection improved system comprises the following steps: S1. Install the limit rod: Install and fix the limit rod on the rotating shaft of the AOD shaking furnace to ensure that it can move with the inclination of the furnace body and trigger the proximity switch at the predetermined position; S2. Set the proximity switch: Install the proximity switch on one side of the rotating shaft cylinder of the AOD shaking furnace without contacting the rotating shaft cylinder, so that the proximity switch is directly opposite to the extreme position of the backward tilt of the furnace body, and adjust the sensing distance of the proximity switch to ensure that when the furnace body reaches the extreme position, the limit mark can trigger the proximity switch; S3. Connect the encoder: Connect the encoder to the channel steel welded on the inner side of the shaft tube port through a spring coupling to ensure that the output shaft of the encoder is coaxial with the shaft tube, so as to accurately detect the inclination angle of the furnace body; S4. Write a control system program: Write a program in the control system so that the system can receive and process the furnace tilt angle signal from the encoder, and start the interlocking protection mechanism when the proximity switch is triggered; S5. Monitor encoder signal: During the operation of the AOD shaking furnace, monitor the encoder output signal in real time to determine whether the furnace tilt angle is consistent with the expectation; S6, start interlock protection: when the encoder signal is wrong or missing, the system immediately starts the interlock protection mechanism and stops the further tilting of the furnace body through the signal of the proximity switch; S7. Implement safety measures: Once the interlocking protection mechanism is activated, the system automatically implements safety measures.

[0011] Preferably, when the interlocking protection mechanism is activated, the safety measures automatically implemented by the system include locking the furnace position, sounding an alarm, and stopping the operation of related equipment.

[0012] Preferably, after the interlocking protection mechanism is activated, the AOD shaking furnace is checked, and after confirming the safe state, the interlocking protection system is manually or automatically reset to restore the normal operation of the AOD shaking furnace.

[0013] Compared with the prior art, the technical effects and advantages of the present invention are: The improved AOD rocking furnace interlock protection system and method. The limit lever cooperates with the proximity switch. The limit lever is fixed on the rotating shaft cylinder and moves as the furnace body tilts. When the furnace body tilts backward to the preset limit position, the limit lever triggers the proximity switch, and the proximity switch sends a signal to the control system. The encoder is connected to the rotating shaft cylinder through a spring coupling and can real-time monitor the tilting angle of the furnace body. The output shaft of the encoder is coaxial with the rotating shaft cylinder to ensure accurate measurement of the tilting angle. The control system program is responsible for receiving the signal from the encoder and starting the interlock protection mechanism when the proximity switch is triggered. When the encoder signal is incorrect or missing, the interlock protection mechanism is activated, and the proximity switch signal is used to stop the further tilting of the furnace body and implement safety measures.

[0014] Through real-time monitoring and the interlock protection mechanism, the system can promptly respond to potential safety risks, prevent risks such as furnace penetration caused by excessive tilting of the furnace body and other safety accidents. The automated control reduces manual intervention, thereby reducing the probability of accidents caused by improper human operation. The interlock protection system can quickly respond and prevent potential accidents, reducing downtime and improving production efficiency. The dual monitoring of the encoder and the proximity switch ensures the high reliability of the system. Even when the encoder fails, the proximity switch can trigger the protection measures. After the safety status is confirmed, the system can be reset manually or automatically to quickly resume the normal operation of the AOD rocking furnace, reducing maintenance time.

[0015] Through these improvement measures, while improving safety and reliability, the AOD rocking furnace interlock protection system also enhances production efficiency and the overall performance of the system. Brief Description of the Drawings Figure 1 It is a structural schematic diagram of the present invention.

[0016] In the figure: 1. Limit lever; 2. Rotating shaft cylinder; 3. Proximity switch; 4. Encoder; 5. Channel steel; 6. L-shaped support A; 7. U-shaped steel plate; 8. C-shaped steel plate; 9. L-shaped support B; 10. Spring coupling. Detailed Embodiment Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] The following is a further detailed description of the present application in conjunction with the attached Figure 1 This application will be further described in detail. The embodiment of the present application discloses an improved interlocking protection system for an AOD rocking furnace, comprising a limit mark rod 1, a proximity switch 3 and an encoder 4. The limit mark rod 1 is installed and fixed on a rotating shaft tube 2 of the AOD rocking furnace; the proximity switch is used in conjunction with the limit mark rod 1, and the proximity switch 3 is directly opposite to the limit position of the backward tilt of the AOD rocking furnace. When the backward tilt of the furnace body of the AOD rocking furnace reaches the limit position, the limit mark rod 1 triggers the proximity switch 3, thereby sending a signal to the control system; The encoder 4 is connected to the channel steel 5 welded to the inner side of the end of the rotating shaft tube 2 through the spring coupling 10, and the output shaft of the encoder 4 is coaxial with the rotating shaft tube 2.

[0018] The encoder 4 is mounted on an L-shaped support A6, which is fixed on the top of a U-shaped steel plate 7, which is fixed on the top of two U-shaped steel plates 8. An L-shaped support B9 is fixed on one side of one of the steel plates, and the proximity switch 3 is mounted on the L-shaped support B9.

[0019] The principle of the improved interlocking protection system of the AOD shaking furnace is mainly to achieve real-time monitoring and control of the inclination angle of the AOD furnace body by adding sensors such as limit markers 1, proximity switches 3 and encoders 4, as well as corresponding interlocking protection logic. The coordination of the limit marker 1 and the proximity switch 3: the limit marker 1 is installed on the shaft tube 2 of the AOD shaking furnace. When the furnace body tilts backward to the preset limit position, the limit marker 1 will trigger the proximity switch 3 installed on the L-shaped support B9. After the proximity switch 3 detects the triggering of the limit marker 1, it immediately sends a signal to the control system. The encoder 4 is connected to the channel steel 5 welded on the inner side of the port of the shaft tube 2 through the spring coupling 10, and its output shaft is coaxial with the shaft tube 2. The encoder 4 can monitor the inclination angle of the furnace body in real time and feed back the inclination angle data to the control system.

[0020] Prevent the risk caused by the failure of encoder 4: By installing the limit mark 1 and the proximity switch 3, even if the encoder 4 fails, the system can still detect the extreme position of the furnace body through the proximity switch 3, thereby triggering protective measures to prevent the furnace body from excessive tilting.

[0021] Timely issuance of interlocking protection signal: Once it is detected that the furnace body has reached the limit position, the system will immediately issue an interlocking protection signal, allowing the control system to take measures, such as slowing down or stopping the movement of the furnace body, thereby avoiding accidents.

[0022] An improved method for an AOD shaking furnace interlocking protection improved system comprises the following steps: S1. Install the limit rod 1: Install and fix the limit rod 1 on the rotating shaft 2 of the AOD shaking furnace to ensure that it can move with the inclination of the furnace body and trigger the proximity switch 3 at a predetermined position; S2. Set the proximity switch 3: Install the proximity switch 3 on one side of the rotating shaft tube 2 of the AOD shaking furnace without contacting the rotating shaft tube 2, so that the proximity switch 3 is directly opposite to the extreme position of the backward tilt of the furnace body, and adjust the sensing distance of the proximity switch 3 to ensure that when the furnace body reaches the extreme position, the limit mark 1 can trigger the proximity switch 3; S3, connect the encoder 4: connect the encoder 4 to the channel steel 5 welded on the inner side of the end of the rotating shaft tube 2 through the spring coupling 10, and ensure that the output shaft of the encoder 4 is coaxial with the rotating shaft tube 2, so as to accurately detect the inclination angle of the furnace body; S4, write a control system program: write a program in the control system so that the system can receive and process the furnace body tilt angle signal transmitted by the encoder 4, and start the interlocking protection mechanism when the proximity switch 3 is triggered; S5, monitor the signal of encoder 4: during the operation of the AOD shaking furnace, monitor the signal output by encoder 4 in real time to determine whether the inclination angle of the furnace body is consistent with the expectation; S6, start interlock protection: when the signal of encoder 4 is wrong or missing, the system immediately starts the interlock protection mechanism and stops the further tilting of the furnace body through the signal of proximity switch 3; S7. Implement safety measures: Once the interlocking protection mechanism is activated, the system automatically implements safety measures.

[0023] Specifically, when the interlocking protection mechanism is activated, the system automatically implements safety measures including locking the furnace position, sounding an alarm, and stopping the operation of related equipment.

[0024] Specifically, after the interlocking protection mechanism is activated, the AOD shaking furnace is checked, and after confirming the safe state, the interlocking protection system is manually or automatically reset to restore the normal operation of the AOD shaking furnace.

[0025] The improved system and method for interlocking protection of AOD shaking furnace significantly improves the safety of AOD furnace operation through real-time monitoring and interlocking protection, and reduces potential safety accidents caused by failure of encoder 4. It reduces the occurrence of faults such as broken air pipe of furnace air gun and damage to universal joint, ensures the stable operation of the production line, and avoids shutdown of furnace and production due to faults. Through timely and effective interlocking protection measures, the time and number of fault repairs are reduced, and production efficiency is improved. The losses caused by safety accidents and production interruptions are reduced, and the economic benefits of the enterprise are improved. At the same time, the maintenance and repair costs are reduced, further increasing the profits of the enterprise.

[0026] Therefore, the AOD shaking furnace interlocking protection improvement system and method are proposed to eliminate human operating errors, improve the safe production efficiency of the furnace, and reduce the production accident rate to 0%, thereby ensuring production safety and improving production efficiency by improving the system's automation level and adding interlocking protection measures.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An improved AOD shaking furnace interlocking protection system, characterized in that: include: A limit rod (1), the limit rod (1) is installed and fixed on the rotating shaft cylinder (2) of the AOD shaking furnace; The proximity switch (3) is used in conjunction with the limit mark (1). The proximity switch (3) is located at the limit position of the AOD rocking furnace backward tilting. When the AOD rocking furnace body backward tilting reaches the limit position, the limit mark (1) triggers the proximity switch (3), thereby sending a signal to the control system. The encoder (4) is connected to a channel steel (5) welded to the inner side of the end of the rotating shaft tube (2) through a spring coupling (10), and the output shaft of the encoder (4) is coaxial with the rotating shaft tube (2).

2. The improved AOD shaking furnace interlocking protection system according to claim 1 is characterized in that: The encoder (4) is mounted on an L-shaped support A (6), the L-shaped support A (6) is fixed on the top of a U-shaped steel plate (7), and the U-shaped steel plate (7) is fixed on the top of two U-shaped steel plates (8).

3. The improved AOD shaking furnace interlocking protection system according to claim 2 is characterized in that: An L-shaped support B (9) is fixedly provided on one side of one of the steel plates, and the proximity switch (3) is mounted on the L-shaped support B (9).

4. A method for improving the AOD shaking furnace interlocking protection improvement system according to any one of claims 1 to 3, characterized in that: The steps include: S1. Install the limit rod (1): install and fix the limit rod (1) on the rotating shaft cylinder (2) of the AOD shaking furnace to ensure that it can move with the inclination of the furnace body and trigger the proximity switch (3) at a predetermined position; S2. Setting the proximity switch (3): Install the proximity switch (3) on one side of the rotating shaft cylinder (2) of the AOD shaking furnace without contacting the rotating shaft cylinder (2), so that the proximity switch (3) is directly opposite to the extreme position of the backward tilt of the furnace body, and adjust the sensing distance of the proximity switch (3) to ensure that when the furnace body reaches the extreme position, the limit mark (1) can trigger the proximity switch (3); S3, connecting the encoder (4): connecting the encoder (4) to the channel steel (5) welded on the inner side of the end of the rotating shaft tube (2) through the spring coupling (10), ensuring that the output shaft of the encoder (4) is coaxial with the rotating shaft tube (2), so as to accurately detect the inclination angle of the furnace body; S4. Writing a control system program: Writing a program in the control system so that the system can receive and process the furnace body tilt angle signal transmitted by the encoder (4) and start the interlocking protection mechanism when the proximity switch (3) is triggered; S5, monitoring the encoder (4) signal: during the operation of the AOD shaking furnace, monitor the signal output by the encoder (4) in real time to determine whether the inclination angle of the furnace body is consistent with the expectation; S6, start interlock protection: when the signal of the encoder (4) is wrong or missing, the system immediately starts the interlock protection mechanism and stops the further tilting of the furnace body through the signal of the proximity switch (3); S7. Implement safety measures: Once the interlocking protection mechanism is activated, the system automatically implements safety measures.

5. The improved method according to claim 4, characterized in that: When the interlocking protection mechanism is activated, the system automatically implements safety measures including locking the furnace position, sounding an alarm, and stopping the operation of related equipment.

6. The improved method according to claim 4, characterized in that: After the interlocking protection mechanism is activated, the AOD shaking furnace is checked. After confirming the safe state, the interlocking protection system is manually or automatically reset to restore the normal operation of the AOD shaking furnace.

Images