Electric arc generation control device based on PLC

Abstract

The utility model discloses a PLC-based arc generation control device, which comprises a first isolation plate and a second isolation plate, the first isolation plate and the second isolation plate are both fixedly arranged on a machine body, a controller is arranged at the front part of the surface of the second isolation plate, an arc generation module is arranged at the rear part of the surface of the second isolation plate, a touch screen is arranged on the surface of the first isolation plate, and the touch screen is arranged on the surface of the second isolation plate. The touch screen is electrically connected with the controller, and the controller is electrically connected with the arc generation module; the controller is responsible for controlling the arc generation module to achieve stable generation and adjustment of the arc, the arc generation module generates the arc according to an instruction of the controller, and the display module is used for displaying the operation state and a parameter setting interface of the whole device. According to the utility model, visual and convenient control of the arc generating device is realized through the touch screen operation interface, so that the operation difficulty and the error rate are greatly reduced; by means of the high-precision control capability of the PLC, accurate regulation and control of arc characteristics can be achieved, and the accuracy and reliability of experimental research are improved.

Description

Technical Field

[0001] This utility model relates to a PLC-based arc generation control device. Background Technology

[0002] With the continuous development of industrial automation, electric arc generators have been widely used in many fields. Currently, the control systems of electric arc generators mostly adopt traditional electrical control methods, such as relay control and switch control. While these methods can meet the basic control requirements of electric arc generators to a certain extent, they have significant shortcomings in terms of ease of operation, control accuracy, and system flexibility. Summary of the Invention

[0003] To address the aforementioned problems, this utility model provides a PLC-based arc generation control device that is simple in structure and reliable in operation.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is: a PLC-based arc generation control device, including a first isolation plate and a second isolation plate, both of which are fixedly installed on the machine body. A controller is provided on the front part of the surface of the second isolation plate, and an arc generation module is provided on the rear part of the surface of the second isolation plate. A touch screen is provided on the surface of the first isolation plate, and the touch screen is electrically connected to the controller. The controller is electrically connected to the arc generation module. The controller is responsible for controlling the arc generation module to realize the stable generation and adjustment of the arc. The arc generation module generates an arc according to the instructions of the controller. The display module is used to display the operating status and parameter setting interface of the entire device.

[0005] The aforementioned PLC-based arc generation control device includes an arc generation module comprising a body, a motor, a lead screw, a slide, a positioning seat, a first pole, a second pole, a main copper rod, an auxiliary copper rod, and a power supply. The motor is fixed to one side of a second isolation plate, and a driver is located in the center of the second isolation plate surface. The controller is electrically connected to the motor via the driver. A positioning seat is fixed to the other side of the second isolation plate, and a first pole is fixed to the positioning seat. An auxiliary copper rod is fixed to the first pole. The output shaft of the motor is fixedly connected to the left end of the lead screw, and a rotary encoder is located at the right end of the lead screw. The rotary encoder is connected to the controller. The device is electrically connected, with a nut threaded onto the lead screw. The slide block is slidably mounted on the second isolation plate and fixedly connected to the nut. A second pole is fixedly mounted on the slide block, and a main copper rod is fixedly mounted on the second pole. The main copper rod and the auxiliary copper rod are located on the same straight line. The power supply device includes a first DC switching power supply and a sliding rheostat. The first DC switching power supply is mounted on the first isolation plate, and the sliding rheostat is mounted on the front part of the surface of the second isolation plate. The positive terminal of the first DC switching power supply is connected to the second pole block after passing through the sliding rheostat, and the first pole block is connected to the negative terminal of the first DC switching power supply, thereby forming a power supply circuit.

[0006] The above-mentioned PLC-based arc generation control device has a power meter on the surface of the first isolation plate. The power meter is a voltmeter, which is connected to the first pole and the second pole respectively to read the voltage when the arc occurs.

[0007] In the above-mentioned PLC-based arc generation control device, a first metal sensor, a second metal sensor, and a third metal sensor are respectively provided on the surface of the second isolation plate at the positions directly below the left end, the middle of the lead screw, and the right end of the lead screw. The signal output terminals of the first metal sensor, the second metal sensor, and the third metal sensor are electrically connected to the controller. An iron plate is provided at the bottom of the slide.

[0008] The aforementioned PLC-based arc generation control device has a terminal block and an emergency stop button located in the center of the surface of the second isolation plate. Both the terminal block and the emergency stop button are electrically connected to the controller.

[0009] The above-mentioned PLC-based arc generation control device has a second DC switching power supply and an air switch on the front of the second isolation plate. The second DC switching power supply supplies power to the controller, motor, rotary encoder, first metal sensor, second metal sensor, third metal sensor and emergency stop button after passing through the air switch.

[0010] The above-mentioned PLC-based arc generation control device uses a PLC, specifically an S7-1200 model. The PLC's Q0.0 and Q0.2 pins are connected to a driver, its I0.5 pin is connected to an emergency stop button, its I0.4 pin is connected to a third metal sensor, its I0.3 pin is connected to a second metal sensor, its I0.2 pin is connected to a first metal sensor, and its I0.1 and I0.0 pins are connected to a rotary encoder.

[0011] The aforementioned PLC-based arc generation control device uses a touchscreen model TPC7062K.

[0012] The aforementioned PLC-based arc generation control device uses a sliding rheostat model RX20-T.

[0013] The beneficial effects of this utility model are as follows: This utility model realizes intuitive and convenient control of the electric arc generating device through the touch screen operation interface, which greatly reduces the difficulty of operation and the error rate; with the help of the high-precision control capability of PLC, the characteristics of the electric arc can be precisely controlled, improving the accuracy and reliability of experimental research; This utility model has good expandability and flexibility, and can easily add or change control functions and parameter settings according to experimental needs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0015] Figure 2 for Figure 1 A schematic diagram of the structure of the electric arc generating module.

[0016] Figure 3 This is the circuit schematic diagram of this utility model.

[0017] Figure 4 This is the circuit connection diagram for the controller.

[0018] Figure 5 This is the circuit connection diagram for a rotary encoder.

[0019] Figure 6 This is a circuit connection diagram of the motor and the driver. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-3 As shown, a PLC-based arc generation control device includes a first isolation plate 1 and a second isolation plate 25, both of which are fixedly mounted on the machine body. A controller 9 is provided on the front of the surface of the second isolation plate 25, and an arc generation module is provided on the rear of the surface of the second isolation plate 25. A touch screen 4 is provided on the surface of the first isolation plate 1, and the touch screen 4 is electrically connected to the controller 9. The controller 9 is electrically connected to the arc generation module. The controller 9 is responsible for controlling the arc generation module to achieve stable generation and adjustment of the arc. The arc generation module generates an arc according to the instructions of the controller 9. The display module is used to display the operating status and parameter setting interface of the entire device.

[0022] like Figure 1 , Figure 2As shown, the arc generating module includes a body, a motor 13, a lead screw 16, a slide 26, a positioning seat 27, a first pole post 22, a second pole post 18, a main copper rod 19, an auxiliary copper rod 21, and a power supply device. The motor 13 is fixed to one side of the second isolation plate 25. A driver 10 is provided in the middle of the surface of the second isolation plate 25. The controller 9 is electrically connected to the motor 13 through the driver 10. The positioning seat 27 is fixedly provided on the other side of the second isolation plate 25. The first pole post 22 is fixedly provided on the positioning seat 27, and the auxiliary copper rod 21 is fixedly provided on the first pole post 22. The output shaft of the motor 13 is fixedly connected to the left end of the lead screw 16 through a lead screw connector 14. A rotary encoder 23 is provided on the right end of the lead screw 16. The rotary encoder 23 is electrically connected to the controller 9. The slide 26 is slidably mounted on the second isolation plate 25 with a nut connected to the upper thread. This means that the slide 26 can slide smoothly on the second isolation plate 25 without excessive friction or resistance. The slide 26 is fixedly connected to the nut. A second pole post 18 is fixedly mounted on the slide 26, and a main copper rod 19 is fixedly mounted on the second pole post 18. The main copper rod 19 and the auxiliary copper rod 21 are located on the same straight line. The motor 13 drives the lead screw 16 to rotate, which can drive the nut threadedly connected to the lead screw 16 to move horizontally. The nut will drive the slide 26 and the second pole post 18 to move linearly along the horizontal direction of the lead screw 16. When the slide 26 moves under the drive of the motor 13, the second pole post 18 will also move accordingly, thereby changing the distance between it and the first pole post 22.

[0023] The power supply device includes a first DC switching power supply 2 and a sliding rheostat 5. The first DC switching power supply 2 is provided on the first isolation plate 1, and the sliding rheostat 5 is provided on the front part of the surface of the second isolation plate 25. The positive terminal of the first DC switching power supply 2 is connected to the second terminal 18 after passing through the sliding rheostat 5, and the first terminal 22 is connected to the negative terminal of the first DC switching power supply 2, thereby forming a power supply circuit.

[0024] The first isolation plate 1 is provided with a power meter 3. The power meter 3 is a voltmeter. The voltmeter is connected to the first pole 22 and the second pole 18 respectively, and is used to read the voltage when the electric arc occurs.

[0025] A first metal sensor 15, a second metal sensor 17, and a third metal sensor 20 are respectively located at the left end, middle, and directly below the right end of the lead screw 16 on the surface of the second isolation plate 25. The signal output terminals of the first metal sensor 15, the second metal sensor 17, and the third metal sensor 20 are electrically connected to the controller 9. An iron plate is provided at the bottom of the slide 26. The first metal sensor 15, the second metal sensor 17, and the third metal sensor 20 are used to detect the position of the slide 26, thereby limiting the slide 26 so that it does not exceed the positions of the first metal sensor 15 and the third metal sensor 20 in the left and right directions. If the device malfunctions, and the slide 26 moves to the right and reaches the position of the third metal sensor 20, the third metal sensor 20 sends a signal to the controller 9, and the controller 9 controls the motor 13 to stop. Similarly, if the slide 26 moves to the left and reaches the position of the first metal sensor 15, the first metal sensor 15 sends a signal to the controller 9, and the controller 9 also controls the motor 13 to stop.

[0026] The second isolation plate 25 has a terminal block 11 and an emergency stop button 12 in the center of its surface. Both the terminal block 11 and the emergency stop button 12 are electrically connected to the controller 9. Pressing the emergency stop button 12 can stop the device in an emergency. The terminal block 11 serves to connect lines and equipment, distribute power and signals, provide electrical isolation and overcurrent protection, facilitate maintenance and repair, and features clear markings, pluggability, and easy expansion with flexible connection methods.

[0027] The front surface of the second isolation plate 25 is provided with a second DC switching power supply 8, an air switch 7, and a socket 6. The second DC switching power supply 8 supplies power to the controller 9, motor 13, rotary encoder 23, first metal sensor 15, second metal sensor 17, third metal sensor 20, and emergency stop button 12 via the air switch 7. The function of the socket 6 is to supply power to other external experimental devices (such as oscilloscopes).

[0028] The second isolation plate 25 has a network switch 24 on its surface. The function of the network switch 24 is to connect the PLC and the touch screen to achieve high-speed data transmission and communication. It can perform network management, provide redundancy design to enhance reliability, and has anti-interference, wide temperature range, and high protection characteristics to adapt to industrial environments.

[0029] The controller 9 uses a PLC, specifically an S7-1200 model. Figure 4As shown, the PLC's Q0.0 and Q0.2 pins are connected to the driver 10, where the Q0.0 pin is used to output motor pulse signals and the Q0.2 pin is used to control the forward and reverse rotation of the motor; the PLC's I0.5 pin is connected to the emergency stop button; the PLC's I0.4 pin is connected to the third metal sensor 20; the PLC's I0.3 pin is connected to the second metal sensor 17; the PLC's I0.2 pin is connected to the first metal sensor 15; and the PLC's I0.1 and I0.0 pins are connected to the rotary encoder 23.

[0030] The touchscreen 4 is model TPC7062K. Touchscreen 4 is a high-performance embedded integrated touchscreen, with an embedded low-power CPU at its core, boasting a 400MHz clock speed. It utilizes a 7-inch high-brightness TFT LCD screen with a resolution of 800×480, and is equipped with a four-wire resistive touchscreen with a resolution of 1024×1024. This configuration ensures excellent performance in both display quality and touch response speed, enabling rapid responses to user touch operations and efficient data processing and transmission. Touchscreen 4's interactive functions include: providing an intuitive user interface, allowing users to easily set and adjust parameters of the arc generating module; real-time display of the device's operating status, such as speed, distance, and status parameters, as well as fault information; and support for data recording and query functions, facilitating user analysis and optimization of the device's operation.

[0031] The sliding rheostat 5 is model RX20-T. It provides precise resistance adjustment in a circuit to meet various circuit requirements. With a power capacity of 300W, it can withstand high power loads and is suitable for high-power applications, offering high reliability and a long lifespan. The rheostat 5 employs a wire-wound structure, allowing for adjustable resistance values ​​by changing the winding length or density. This results in good stability and reliability, enabling stable operation under prolonged high load conditions. Furthermore, the rheostat 5 features a low temperature coefficient, low noise, no current noise, and non-linearity. Adjusting the resistance of the rheostat 5 connected to the power supply circuit allows for adjustment of the current in the power supply circuit.

[0032] like Figure 5 As shown, the rotary encoder 23 is connected to the PLC. The white and green signal lines are connected to the I0.0 and I0.1 pins of the PLC, and the black and red signal lines are connected to the positive and negative terminals of the second DC switching power supply 8.

[0033] like Figure 6As shown, the DIR- and PUL- pins of the driver 10 are connected to the negative terminal of the second DC switching power supply 8, the DIR+ and PUL+ pins are connected to the Q0.0 and Q0.2 pins of the PLC respectively, the B-, B+, A-, and A+ pins are connected to the black, green, blue, and red signal lines of the motor 13 respectively, VCC is connected to the positive terminal of the second DC switching power supply 8, and GND is connected to the negative terminal of the second DC switching power supply 8.

[0034] The working process of this utility model is as follows:

[0035] In the initial state, the first pole piece 22 is located in the middle position, which is the location of the second metal sensor 17;

[0036] The controller 9 drives the motor 13 to rotate forward, and the motor 13 drives the lead screw 16 to rotate clockwise. This can drive the nut threadedly connected to the lead screw 16 to move horizontally to the right. The nut will then drive the slide 26 and the second pole post 18 to move linearly to the right along the lead screw 16, thereby reducing the distance between them and the first pole post 22, until the auxiliary copper rod 21 on the first pole post 22 and the end of the main copper rod 19 on the second pole post 18 are in contact with each other.

[0037] When the power supply device is started, the current emitted from the positive terminal of the first DC switching power supply 2 passes through the sliding rheostat 5, the second terminal 18, the main copper rod 19, the auxiliary copper rod 21, and the first terminal 22 in sequence before returning to the negative terminal of the first DC switching power supply 2, and the power supply circuit is connected.

[0038] The controller 9 drives the motor 13 to reverse, and the motor 13 drives the lead screw 16 to rotate counterclockwise, which drives the nut threadedly connected to the lead screw 16 to move horizontally to the left. The nut will then drive the slide 26 and the second pole post 18 to move linearly to the left along the lead screw 16, so that the auxiliary copper rod 21 on the first pole post 22 and the end of the main copper rod 19 on the second pole post 18 are separated, thereby pulling out an electric arc.

[0039] During the process from the arc being drawn out to its disappearance, the voltage generated at both ends of the arc can be detected in real time by the power meter 3; the rotary encoder 23 can detect the rotational speed of the motor in real time, and the rotational speed of the motor can indirectly reflect the moving speed of the slide 26. The controller 9 controls the moving speed of the slide 26 by controlling the rotational speed of the motor, thereby controlling the time from the generation of the arc to its disappearance; various data measured in real time can be displayed on the touch screen 4.

Claims

1. A PLC-based arc generation control device, characterized in that: The device includes a first isolation plate and a second isolation plate, both of which are fixedly mounted on the machine body. A controller is located on the front of the surface of the second isolation plate, and an arc generating module is located on the rear of the surface of the second isolation plate. A touch screen is located on the surface of the first isolation plate. The touch screen is electrically connected to the controller, and the controller is electrically connected to the arc generating module. The controller is responsible for controlling the arc generating module to achieve stable generation and adjustment of the arc. The arc generating module generates an arc according to the instructions of the controller. The display module is used to display the operating status and parameter setting interface of the entire device.

2. The PLC-based arc generation control device according to claim 1, characterized in that: The arc generating module includes a body, a motor, a lead screw, a slide, a positioning seat, a first pole, a second pole, a main copper rod, an auxiliary copper rod, and a power supply device. The motor is fixed to one side of the second isolation plate. A driver is located in the middle of the surface of the second isolation plate. The controller is electrically connected to the motor through the driver. A positioning seat is fixed to the other side of the second isolation plate. A first pole is fixed to the positioning seat, and an auxiliary copper rod is fixed to the first pole. The output shaft of the motor is fixedly connected to the left end of the lead screw. A rotary encoder is located at the right end of the lead screw and is electrically connected to the controller. A nut is threaded onto the lead screw. The slide is slidably mounted on the second isolation plate and fixedly connected to the nut. A second pole is fixed to the slide, and a main copper rod is fixed to the second pole. The main copper rod and the auxiliary copper rod are located on the same straight line. The power supply device includes a first DC switching power supply and a sliding rheostat. The first DC switching power supply is located on the first isolation plate, and the sliding rheostat is located at the front of the surface of the second isolation plate. The positive terminal of the first DC switching power supply is connected to the second pole through the sliding rheostat, and the first pole is connected to the negative terminal of the first DC switching power supply, thereby forming a power supply circuit.

3. The PLC-based arc generation control device according to claim 2, characterized in that: The surface of the first isolation plate is equipped with a power meter, which is a voltmeter. The voltmeter is connected to the first pole and the second pole respectively to read the voltage when the electric arc occurs.

4. The PLC-based arc generation control device according to claim 2, characterized in that: The second isolation plate is provided with a first metal sensor, a second metal sensor, and a third metal sensor at positions directly below the left end, the middle end, and the right end of the lead screw, respectively. The signal output terminals of the first metal sensor, the second metal sensor, and the third metal sensor are electrically connected to the controller. The bottom of the slide is provided with an iron plate.

5. The PLC-based arc generation control device according to claim 4, characterized in that: The second isolation plate has a terminal block and an emergency stop button in the middle of its surface. Both the terminal block and the emergency stop button are electrically connected to the controller.

6. The PLC-based arc generation control device according to claim 5, characterized in that: The front part of the second isolation plate is provided with a second DC switching power supply and an air switch. The second DC switching power supply supplies power to the controller, motor, rotary encoder, first metal sensor, second metal sensor, third metal sensor and emergency stop button after passing through the air switch.

7. The PLC-based arc generation control device according to claim 6, characterized in that: The controller uses a PLC, model S7-1200. The PLC's Q0.0 and Q0.2 pins are connected to the driver, the PLC's I0.5 pin is connected to the emergency stop button, the PLC's I0.4 pin is connected to the third metal sensor, the PLC's I0.3 pin is connected to the second metal sensor, the PLC's I0.2 pin is connected to the first metal sensor, and the PLC's I0.1 and I0.0 pins are connected to the rotary encoder.

8. The PLC-based arc generation control device according to claim 1, characterized in that: The touchscreen model is TPC7062K.

9. The PLC-based arc generation control device according to claim 2, characterized in that: The sliding rheostat is model RX20-T.

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