Off-line or on-line monitoring device of continuous casting machine vibration equipment

Abstract

The utility model discloses an off-line or on-line monitoring device for vibration equipment of a continuous casting machine in the metallurgical industry, which comprises a monitoring element, a signal processing unit, a signal communication unit, an auxiliary protective cover, a metal hose, a communication cable and a computer, the monitoring elements are divided into a position monitoring element (a laser distance measuring sensor or a magnetoscale sensor) and an acceleration monitoring element (an acceleration sensor), and the two monitoring elements are respectively mounted in a protective cover on a continuous casting machine vibration equipment frame and a protective cover on a continuous casting machine vibration equipment pull rod; the acceleration monitoring element is matched with a metal hose and connected with compressed air for cooling, the signal processing unit and the signal communication unit are also installed in the protective cover, the communication cable is located in the metal hose and used for connecting the signal processing unit and the computer, the computer displays monitoring data information, and the number is determined according to the flow number of the continuous casting machine. The system is reasonable in design, convenient to use, accurate, stable and reliable in monitoring signal, has great significance in production guidance, and is suitable for wide popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical industry, in particular to an off-line or on-line monitoring device for vibration equipment of a continuous casting machine. Background Art

[0002] The steel industry is a raw material industry and a foundational industry for national economic development. Steel products are widely used across all sectors of the national economy, and its development is inextricably linked to the scale and speed of a country's overall economic development. In a steel company's steelmaking workshop, the continuous casting machine is the equipment that continuously pours high-temperature molten steel into ingots with defined cross-sectional shapes and dimensions. The continuous casting mold cools and shapes the molten steel. The continuous casting vibration system prevents the mold's inner wall from adhering to the molten steel, allowing the ingots to be de-shelled. This vibration system is a core component of the continuous casting machine. Ensuring stable operation of the vibration system is crucial for continuous casting production and a key factor in ensuring ingot quality.

[0003] A typical continuous casting machine has multiple strands, each equipped with a vibrating device. The production speed of each strand is the casting speed. The casting speeds of multiple strands do not necessarily have to be the same.

[0004] The vibrating device of a continuous casting machine is a device that reciprocates up and down, with a frequency range of 50-300 vibrations per minute. The vibration frequency of the vibrating device is interlocked with the casting speed, with different vibration frequencies at different casting speeds. Horizontal movement of the vibrating device on a continuous casting machine is detrimental to billet production, especially lateral movement.

[0005] Currently, many steel companies lack monitoring and inspection methods for the operation of their continuous casting machine's vibration equipment. They can only assess its performance through periodic production stoppages or by inversely evaluating the quality of the cast strands. The following is a steel plant's inspection steps for its continuous casting machine's vibration equipment: 1. Check the lubrication system of the continuous casting machine's vibration equipment to ensure normal operation. 2. Release the electrical interlock between the continuous casting machine's vibration equipment and the straightening machine (another key piece of equipment in the continuous casting machine, with a logically linked relationship). 3. Operate the continuous casting machine's vibration equipment and adjust the vibration frequency to the lowest frequency that matches the equipment's minimum speed. 4. Check the amplitude with a magnetic micrometer to ensure it is within the tolerance range required by the process. 5. Observe and listen to the transmission mechanism of the continuous casting machine's vibration equipment to ensure there are no unusual sounds. 6. Check the vibration frequency with a stopwatch to ensure it is within the tolerance range required by the process. 7. Observe the balance of the continuous casting machine's vibration equipment. If any abnormality is detected, request further inspection by a fitter. 8. Adjust the vibration frequency to match the average operating casting speed, then perform the checks listed in items 4-7 above to ensure normal operation. 9. Adjust the vibration frequency to the highest vibration frequency that matches the highest working pulling speed, and then perform the above 4-7 checks to ensure normal operation.

[0006] Such inspections are time-consuming and labor-intensive, severely impacting production efficiency. The problem is that these inspections only provide a qualitative assessment of the continuous casting machine's vibration equipment. Furthermore, these assessments rely solely on empirical evidence, and different people's judgments may differ. Even so, these inspections are merely off-line tests of the machine's vibration equipment, performed without load, and cannot guarantee that the equipment will operate identically under normal production conditions.

[0007] Another situation that cannot be checked under no-load conditions is the interference and resonance between multiple continuous casting machine vibration devices. Because the continuous casting machine vibration devices are installed on the same mounting base, at certain frequencies or when the mechanical strength of the base is insufficient, the operation of a single continuous casting machine vibration device may affect other continuous casting machine vibration devices, which is called interference. The operation of multiple continuous casting machine vibration devices with the same vibration frequency may affect other or their own vibrations, which is called resonance. Interference and resonance occur within a certain range of casting speeds, namely the interference zone and the resonance zone. Beyond this range of casting speeds, the interference and resonance phenomena may decrease or disappear. The traditional method is to remove this vibration frequency from the continuous casting machine vibration device control program (continuous casting machine PLC program, not included in the present utility model) and replace it with a constant vibration frequency within this range. The most direct consequence of this is that the effect of the continuous casting machine vibration device is reduced within this range of casting speeds, and the surface quality of the ingot is reduced.

[0008] In order to completely solve the problem of status inspection of vibration equipment of continuous casting machines in the metallurgical industry, the present utility model is proposed. Utility Model Content

[0009] The purpose of the utility model is to provide an off-line or on-line monitoring device for a continuous casting machine vibration device, so as to solve the problems raised in the above background technology.

[0010] To achieve the above purpose, the utility model provides the following technical solution: a first protective cover is installed on the continuous casting machine vibration equipment frame, the first protective cover is divided into an inner and outer layer, and an acceleration monitoring element, a signal communication unit, and a signal processing unit are installed in the inner layer.

[0011] Preferably, an exhaust port is left on the outer layer of the first protective cover, the inner layer components are sealed with epoxy resin, and the communication port position is also waterproofed.

[0012] Preferably, the signal processing unit is connected to the computer via a first communication cable, and the first communication cable is provided with a metal hose for cooling. The metal hose is connected to external compressed air at a compressed air access node to cool the first protective cover and the first communication cable.

[0013] Preferably, a second protective cover is installed on the original continuous casting machine vibration device pull rod, a position monitoring element is installed in the second protective cover, and the protective cover shell is fixed on the fixing member.

[0014] Preferably, one end of the fixing member can move up and down along with the pull rod of the continuous casting machine vibration device, and the other end is fixed.

[0015] Preferably, the position monitoring element is connected to the computer via a second communication cable.

[0016] The beneficial effects of the present invention are as follows: the present invention can detect the operating conditions of the continuous casting machine vibration equipment, such as the force, vibration frequency, swing angle, etc. of the continuous casting machine vibration equipment frame, through the acceleration sensor, thereby determining the operating status of the continuous casting machine vibration equipment. The vibration amplitude and position of the continuous casting machine vibration equipment are measured by the position sensor, thereby determining the operating status of the continuous casting machine vibration equipment. The present invention device quantifies the working status of the continuous casting machine vibration equipment. Based on these relevant data, workers can intuitively observe the operating position, force, frequency, and swing angle of the continuous casting machine vibration equipment. Moreover, the device can comprehensively analyze the data to determine the stuck position, resonance area, interference area, and other information of the continuous casting machine vibration equipment. It has great reference significance for the maintenance of the continuous casting machine vibration equipment and stable production.

[0017] The advantage of the utility model is that it can monitor the operating status of the continuous casting machine vibration equipment in real time, thereby promptly discovering abnormal conditions of the continuous casting machine vibration equipment and promptly reminding users to take measures, thereby ensuring the normal production of the continuous casting machine vibration equipment, predicting the hidden dangers of the continuous casting machine vibration equipment, improving the service life of the continuous casting machine vibration equipment, and stabilizing the quality of the casting.

[0018] Therefore, the utility model is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model

[0020] Figure 1 In: 1. Continuous casting machine vibration equipment frame, 2. Continuous casting machine vibration equipment pull rod, 3. Continuous casting machine vibration transmission, 4. Acceleration monitoring element, 5. Signal communication unit, 6. Signal processing unit, 7. First protective cover, 8. First communication cable, 9. Metal hose, 10. Position monitoring element, 11. Second protective cover, 12. Fixing part, 13. Second communication cable, 14. Compressed air access node, 15. Computer.

[0021] Figure 2 This is the circuit principle diagram of the acceleration monitoring element of this utility model.

[0022] Figure 3 This is the circuit principle diagram of the signal processing unit of the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-3 The utility model provides a technical solution: an offline or online monitoring device for a continuous casting machine vibration device, comprising a first protective cover 7 installed on the original continuous casting machine vibration device frame 1, the first protective cover 7 being divided into an inner and outer layer, the inner layer being equipped with an acceleration monitoring element 4, a signal communication unit 5, and a signal processing unit 6, and an exhaust port being reserved on the outer layer, the signal processing unit 6 being connected to a computer 15 via a first communication cable 8, the first communication cable 8 being externally provided with a metal hose 9 for cooling, the metal hose 9 being connected to external compressed air at a compressed air access node 14 to cool the first protective cover 7 and the first communication cable 8. A second protective cover 11 is installed on the original continuous casting machine vibration device pull rod 2, a position monitoring element 10 being installed in the second protective cover 11, the second protective cover 11 being externally fixed to a fixing member 12, one end of the fixing member 12 being able to move up and down with the continuous casting machine vibration device pull rod 2, and the other end being fixed. The position monitoring element 10 is connected to a computer 15 via a second communication cable 13.

[0025] Specifically, in order to reduce the impact of harsh production environment temperature and humidity on the acceleration monitoring element 4, signal communication unit 5, and signal processing unit 6, a first protective cover 7 is set, and a metal hose 9 is used to connect external compressed air at the compressed air access node 14 to cool the first protective cover 7.

[0026] Specifically, in order to reduce the impact of harsh production environment temperature and humidity on the first communication cable 8, a metal hose 9 is used to connect external compressed air at the compressed air access node 14, and the first communication cable 8 is placed in the metal hose 9 to cool the first communication cable 8.

[0027] Specifically, in order to improve the sealing performance, the components inside the first protective cover 7 are sealed with epoxy resin, and the communication port position is also waterproofed.

[0028] Specifically, in order to improve the waterproof performance, the outer layer of the first protective cover 7 is provided with exhaust holes, which can also discharge compressed air and water vapor therein.

[0029] Specifically, in order to facilitate the fixing of the first protective cover 7 , the first protective cover 7 has position adjustment and angle adjustment functions.

[0030] Specifically, in order to protect the position monitoring element 10, a second protective cover 11 is provided, and the second protective cover 11 has a function of adjusting the position angle.

[0031] Specifically, in order to collect the position change signal, the second protective cover 11 is externally fixed on the fixing member 12. One end of the fixing member 12 can move up and down with the pull rod 2 of the continuous casting machine vibration device, and the other end is fixed.

[0032] Specifically, the acceleration monitoring element 4 (accelerometer) uses a sensor module with the MPU6050 chip. This category of modules mainly includes the MPU6050 sensor module, MPU6500 sensor module, MPU9250 sensor module, BMI160 sensor module, ADXL345 sensor module, ADXL335 sensor module, etc. This category of modules integrates a three-axis gyroscope and a three-axis accelerometer sensor module, and has the functions of measuring the angle of the object's motion posture and the force, and is often used in object posture and motion control applications. The measurement accuracy is as high as 0.00049g, using I 2 C communication mode transmits measurement data at high speed. The actual measurement range is ±2g and the working range is ±1g. Its pins include VCC, GND, SCL, SDA, XDA and XCL. The circuit schematic diagram of the acceleration monitoring element 4 of this utility model is shown in Figure 2 .

[0033] Specifically, the position monitoring element 10 uses a laser ranging sensor or a magnetic scale sensor. The sensor can be the BL-100NMZ laser ranging sensor, which has a measurement accuracy of up to 0.002mm and uses analog or 485 communication to read measurement data at high speed. The actual measurement range is ±10mm, and the operating range is ±4mm. Alternatively, the sensor can be the BTL7-E501-M0100-P-S32 magnetic scale sensor, which has a measurement accuracy of up to 0.01mm and uses analog or 485 communication to read measurement data. The actual measurement range is ±10mm, and the operating range is ±4mm. In comparison, laser ranging sensors have superior overall performance compared to magnetic scale sensors, are non-contact, and have a longer lifespan. Furthermore, magnetic scales have strong industrial applicability. Both can meet measurement requirements. Ultimately, the appropriate detection element is selected based on actual on-site conditions. Both laser ranging sensors and magnetic scale sensors are purchased as finished products.

[0034] Specifically, the signal processing unit 6 selects an Arduino microcontroller, and the optional models are as follows: Arduino Uno R3 series microcontroller, Arduino Mega series microcontroller, Arduino Leonardo series microcontroller, Arduino Nano microcontroller, Arduino Mini microcontroller, etc. The above models all have I 2C bus protocol communication capability. Taking the Arduino UnoR3 microcontroller as an example, the circuit schematic diagram of the signal processing unit 6 of the utility model is shown in FIG. Figure 3 Its pins include 14 digital pins (input / output), 6 analog pins (input / output), VCC, GND, SCL (pin A5), SDA (pin A4), etc. The Arduino microcontroller is a purchased product.

[0035] Specifically, the signal processing unit 6 reads the acceleration monitoring element 4 through I 2 C-bus protocol. This is achieved by connecting the SCL (pin A5) and SDA (pin A4) of the signal processing unit 6 to the SCL (pin) and SDA (pin) of the acceleration monitoring element 4; connecting the VCC and GND of the signal processing unit 6 to the VCC and GND of the acceleration monitoring element 4; and leaving the other pins floating.

[0036] Specifically, signal communication unit 5 uses an Arduino Ethernet module, model: W5500 Ethernet Shield Ethernet module. It is used in conjunction with an Arduino microcontroller to implement Ethernet data transmission. The Arduino Ethernet module is a purchased product.

[0037] Specifically, the signal communication unit 5 and the signal processing unit 6 are connected in a plug-in manner, that is, the signal communication unit 5 is directly plugged into the signal processing unit 6 (the pin positions of the two are the same).

[0038] Specifically, the internal program of the signal processing unit 6 is mainly responsible for collecting and processing the data of the acceleration monitoring element 4 and communicating with the computer 15. This program is a self-developed software and is a single-chip microcomputer program written in the Arduino IDE programming environment. It mainly completes the basic functions of the program by loading the function functions of the third-party library (kalman.h, I2Cdev.h, Wire.h, MPU6050.h, arduinofft.h). The relevant functions in I2Cdev.h and Wire.h are used to realize the I2C communication with the acceleration monitoring element 4. 2C-bus protocol communication; using functions within MPU6050.h to acquire 6050 chip data; using functions within kalman.h to filter the acquired data and eliminate signal noise, thereby obtaining real-time data on the continuous casting machine's vibration equipment, including acceleration values ​​in three dimensions, i.e., real-time force and swing angle parameters; using functions within arduinofft.h to analyze signal frequency components, i.e., frequency domain analysis, thereby obtaining real-time data such as the vibration frequency of the continuous casting machine's vibration equipment. Real-time communication with the computer 15 is achieved using the built-in Serial functions within the Arduino IDE programming environment.

[0039] Specifically, Computer 15 Monitoring Software is independently developed and written. Version 1.0 of the monitoring program was written in the Visual Basic 6.0 programming environment and utilizes the Winsock plug-in to achieve free communication control of the serial port. Version 2.0 of Computer 15 Monitoring Software is written in the PyCharm programming environment and uses the Python 3.12 interpreter. The monitoring program utilizes the Pyside2 and PyQt5 windowing libraries and the pyserial serial communication library or socket library to achieve free communication with the serial port or standard Ethernet communication.

[0040] Specifically, the monitoring software on computer 15 communicates with signal processing unit 6 via either a serial port or Ethernet. This depends primarily on the length of first communication cable 8 (derived from on-site surveying). Serial communication is used for lengths under 30 meters, while Ethernet communication is used for lengths longer than 30 meters. The serial communication rate is 115,200 bps. The Ethernet communication rate is 10M / 100M.

[0041] Specifically, the type of the first communication cable 8 is determined based on the communication method between the computer 15 monitoring software and the signal processing unit 6. If the communication method is serial, a serial cable is selected; if the communication method is Ethernet, an Ethernet cable is selected.

[0042] Specifically, the communication format between the computer 15 monitoring software and the signal processing unit 6 is a custom communication data structure, and data encryption and data integrity verification are performed.

[0043] Specifically, the computer 15 monitoring software reads the position monitoring element 10 via the 485 communication method.

[0044] Specifically, the second communication cable 13 between the computer 15 and the position monitoring element 10 is a serial cable.

[0045] Specifically, after the monitoring software of the computer 15 reads the data from the signal processing unit 6 and the position monitoring element 10, it first performs decryption verification and then displays it on the screen.

[0046] Specifically, the computer 15 monitoring software version v1.0 displays signals in a way that uses the MSChart control in the Visual Basic 6.0 programming environment to draw waveforms of the data. The screen is divided into three waveform display windows. The left side is the vibration status display window, which displays the operating force of the continuous casting machine vibration equipment in the three-dimensional direction. The data comes from the acceleration data collected by the acceleration monitoring element 4 (MPU6050 chip built-in function). The upper right is the swing angle display window in the inner and outer directions. The data comes from the gyroscope data collected by the acceleration monitoring element 4 (MPU6050 chip built-in function). The lower right is the operating position data of the continuous casting machine vibration equipment in the three-dimensional direction. The data comes from the position monitoring element 10. The computer monitoring software version v2.0 displays signals in a way that uses the pyplot function in the matplotlib library of the python language in the pyCharm programming environment to draw waveforms of the data. The display content of the computer monitoring software v2.0 is consistent with that of version v1.0.

[0047] Working principle: When using the present invention, the various devices of the present invention are fixed in appropriate positions, and the computer collects data of the position monitoring element (laser distance sensor or magnetic scale sensor) and the acceleration monitoring element (acceleration sensor) at high speed: (the observer stands on the continuous casting machine operating platform facing the continuous casting machine vibration equipment) front-to-back acceleration and swing angle, left-to-right acceleration and swing angle, up-down acceleration and swing angle, up-down equipment position value and other effective continuous casting machine vibration equipment operating status parameters. The present invention adopts Kalman filtering algorithm, fusion algorithm, multiple filtering algorithm and Fourier transform, engineering value logic operation, etc. to calculate the real-time position of the continuous casting machine vibration equipment, the real-time force in each direction of the continuous casting machine vibration equipment, the real-time swing angle in each direction of the continuous casting machine vibration equipment, the real-time vibration frequency of the continuous casting machine vibration equipment, the real-time speed of the continuous casting machine vibration equipment, the number of swings of the continuous casting machine vibration equipment, etc., which are useful for judging the status of the continuous casting machine vibration equipment and displaying various operating parameter curves. This allows for timely detection of abnormalities in the continuous casting machine's vibration equipment and prompts users to take action, ensuring normal production, predicting potential hazards, extending the equipment's service life, and stabilizing the quality of cast billets. Therefore, it is suitable for widespread promotion.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An off-line or on-line monitoring device for a continuous casting machine vibration device, characterized in that: A first protective cover (7) is installed on the original continuous casting machine vibration equipment frame (1), and an acceleration monitoring element (4), a signal communication unit (5), and a signal processing unit (6) are installed in the first protective cover (7) and an exhaust port is reserved.

2. The off-line or on-line monitoring device for continuous casting machine vibration equipment according to claim 1, characterized in that: The signal processing unit (6) is connected to a computer (15) via a first communication cable (8). The first communication cable (8) is provided with an external cooling metal hose (9). The metal hose (9) is connected to external compressed air at a compressed air access node (14) to cool the first protective cover (7) and internal equipment.

3. The off-line or on-line monitoring device for continuous casting machine vibration equipment according to claim 2, characterized in that: A second protective cover (11) is installed on the original continuous casting machine vibration equipment pull rod (2), a position monitoring element (10) is installed inside the second protective cover (11), and the second protective cover (11) is fixed on a fixing member (12) outside, one end of the fixing member (12) can move up and down with the continuous casting machine vibration equipment pull rod (2), and the other end is fixed.

4. The off-line or on-line monitoring device for continuous casting machine vibration equipment according to claim 3, characterized in that: The position monitoring element (10) is connected to the computer (15) via a second communication cable (13).

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