A welding system

Abstract

This utility model relates to the field of welding technology, and more particularly to a welding system. The system includes: an AC submerged arc welding device and a welding cloud management platform; the AC submerged arc welding device is connected to both the welding cloud management platform and an external power supply; the AC submerged arc welding device is used to acquire the current welding parameters corresponding to the AC submerged arc welding device and the workpiece parameters to be welded, and transmits the current welding parameters and workpiece parameters to the welding cloud management platform; the welding cloud management platform is used to acquire a target configuration table based on the current welding parameters, determine the target welding parameters based on the workpiece parameters and the target configuration table, and send the target welding parameters to the AC submerged arc welding device; the AC submerged arc welding device is also used to receive the AC voltage input from the external power supply, convert the AC voltage based on the target welding parameters, and weld the workpiece to be welded according to the generated target output voltage. This utility model can automatically determine welding parameters, realizing automated welding.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a welding system. Background Technology

[0002] The use of thick steel plates to weld large components in marine equipment structures is becoming increasingly widespread. However, the welding workload of long welds in medium and thick plates is large. In order to improve welding production efficiency, high voltage and high speed welding process parameters are used in submerged arc welding. However, this will increase the risk of problems such as arc blow, weld undercut, and heat marks. In addition, excessive welding heat input will also lead to coarsening of weld joint grains and a decrease in weld mechanical properties.

[0003] Existing submerged arc welding suffers from problems such as magnetic blow, large heat input, uncontrollable welding quality, and lack of traceability. AC submerged arc welding is complicated because six parameters—speed, current, voltage, frequency, duty cycle, and balance—require manual determination and adjustment. Utility Model Content

[0004] The main objective of this invention is to provide a welding system that addresses the technical problem of complex submerged arc welding operations caused by the need for manual determination of welding parameters.

[0005] To achieve the above objectives, this utility model proposes a welding system, which includes: an AC submerged arc welding device and a welding cloud management platform; the AC submerged arc welding device is connected to the welding cloud management platform and an external power supply respectively.

[0006] The AC submerged arc welding device is used to acquire the current welding parameters corresponding to the AC submerged arc welding device and the workpiece parameters of the workpiece to be welded, and to transmit the current welding parameters and the workpiece parameters to the welding cloud management platform.

[0007] The welding cloud management platform is used to obtain a target configuration table based on the current welding parameters, determine target welding parameters based on the workpiece parameters and the target configuration table, and send the target welding parameters to the AC submerged arc welding device.

[0008] The AC submerged arc welding device is also used to receive the AC voltage input from the external power supply, convert the AC voltage based on the target welding parameters, and weld the workpiece to be welded according to the target output voltage generated by the conversion.

[0009] In one embodiment, the AC submerged arc welding apparatus further includes: an inverter unit, a main control unit, and a voltage output unit;

[0010] The inverter unit is connected to the external power supply, the main control unit, and the voltage output unit, respectively. The voltage output unit is connected to the AC submerged arc welding device.

[0011] The main control unit is used to transmit the target welding parameters to the inverter unit;

[0012] The inverter unit is used to convert the received AC voltage from the external power supply based on the target welding parameters, and to weld the workpiece to be welded by the voltage output unit according to the converted target output voltage.

[0013] In one embodiment, the AC submerged arc welding apparatus further includes: an AC input rectifier unit and a passive filter unit;

[0014] The AC input rectifier unit is connected to the external power supply and the passive filter unit, and the passive filter unit is connected to the inverter unit;

[0015] The AC input rectifier unit is used to rectify the AC voltage received from the external power supply and transmit the obtained DC voltage to the passive filter unit.

[0016] The passive filtering unit is used to filter the DC voltage and transmit the filtered DC voltage to the inverter unit;

[0017] The inverter unit is also used to invert the filtered DC voltage based on the target welding parameters.

[0018] In one embodiment, the AC input rectifier unit includes: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode;

[0019] The anode of the first diode is connected to the cathode of the second diode and the external power supply. The cathode of the first diode is connected to the cathode of the third diode, the cathode of the fifth diode and the passive filter unit. The anode of the second diode is connected to the anode of the fourth diode, the anode of the sixth diode and the passive filter unit. The anode of the third diode is connected to the cathode of the fourth diode and the external power supply. The anode of the fifth diode is connected to the cathode of the sixth diode and the external power supply.

[0020] In one embodiment, the inverter unit further includes: a first inverter subunit, a second inverter subunit, and a rectifier subunit;

[0021] The first inverter sub-unit is connected to the passive filter unit and the second inverter sub-unit, and the voltage output unit is also connected to the first inverter sub-unit and the second inverter unit respectively;

[0022] The first inverter subunit is used to perform a first inversion on the filtered DC voltage based on the target welding parameters to obtain a first AC voltage, and transmit the first AC voltage to the rectifier subunit;

[0023] The rectifier subunit is used to rectify the primary AC voltage and transmit the generated primary DC voltage to the second inverter subunit;

[0024] The second inverter sub-unit is used to perform a secondary inversion on the primary DC voltage based on the target welding parameters to obtain the target output voltage.

[0025] In one embodiment, the rectifier sub-unit further includes: a seventh diode, an eighth diode, a ninth diode, and a tenth diode;

[0026] The cathode of the seventh diode is connected to the anode of the eighth diode and the first inverter sub-unit. The anode of the seventh diode is connected to the second inverter sub-unit and the anode of the tenth diode. The cathode of the eighth diode is connected to the cathode of the ninth diode and the second inverter sub-unit. The anode of the ninth diode is connected to the cathode of the tenth diode and the second inverter sub-unit.

[0027] In one embodiment, the voltage output unit further includes: a first interface and a second interface;

[0028] The first interface is connected to the first inverter sub-unit, and the second interface is connected to the second inverter sub-unit.

[0029] In one embodiment, the voltage output unit further includes: a first inductor;

[0030] The first end of the first inductor is connected to the first inverter sub-unit, and the second end of the first inductor is connected to the first interface.

[0031] In one embodiment, the AC submerged arc welding apparatus further includes: a networking unit;

[0032] The networking unit is connected to both the welding cloud management platform and the main control unit.

[0033] The networking unit is used to transmit the current welding parameters and the workpiece parameters to the welding cloud management platform;

[0034] The welding cloud management platform is also used to transmit the target welding parameters to the main control unit through the networking unit.

[0035] In one embodiment, the AC submerged arc welding apparatus further includes: a feedback unit;

[0036] The feedback unit is connected to the inverter unit, the voltage output unit, and the main control unit, respectively.

[0037] The voltage feedback unit is used to acquire the output voltage value and output current value corresponding to the target output voltage, and transmit the output voltage value and output current value to the main control unit;

[0038] The main control unit is also used to adjust the target welding parameters based on the output voltage value and the output current value, and send the adjusted target welding parameters to the inverter unit;

[0039] The inverter unit is also used to convert the AC voltage received from the external power supply input based on the adjusted target welding parameters to obtain a new target output voltage, and transmit the new target output voltage to the voltage output unit. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the first embodiment of the welding system proposed in this utility model;

[0042] Figure 2 This is another structural schematic diagram of the first embodiment of the welding system proposed in this utility model;

[0043] Figure 3 This is a structural schematic diagram of the third embodiment of the welding system proposed in this utility model.

[0044] Explanation of icon numbers:

[0045]

[0046]

[0047] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed by this utility model.

[0052] It should be noted that the use of thick steel plates to weld large components in marine equipment structures is becoming increasingly widespread. However, the welding workload of long welds on medium and thick plates is large. In order to improve welding production efficiency, high voltage and high speed welding process parameters are used in submerged arc welding. However, this will increase the risk of problems such as arc blow, weld undercut, and heat marks. In addition, excessive welding heat input will also lead to coarsening of weld joint grains and a decrease in weld mechanical properties.

[0053] Existing submerged arc welding suffers from problems such as magnetic blow, large heat input, uncontrollable welding quality, and lack of traceability. AC submerged arc welding is complicated because six parameters—speed, current, voltage, frequency, duty cycle, and balance—require manual determination and adjustment.

[0054] For ease of understanding, the following is combined with Figures 1 to 3 The welding system provided in the embodiments of this application will be described in detail.

[0055] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the welding system proposed in this utility model.

[0056] like Figure 1 As shown, in this embodiment, the welding system may include:

[0057] AC submerged arc welding device 2, welding cloud management platform 13; the AC submerged arc welding device 2 is connected to the welding cloud management platform 1 and an external power supply respectively;

[0058] The AC submerged arc welding device 2 is used to acquire the current welding parameters and the workpiece parameters of the workpiece to be welded corresponding to the AC submerged arc welding device 2, and transmit the current welding parameters and the workpiece parameters to the welding cloud management platform 1.

[0059] The welding cloud management platform 1 is used to obtain a target configuration table based on the current welding parameters, determine target welding parameters based on the workpiece parameters and the target configuration table, and send the target welding parameters to the AC submerged arc welding device 2.

[0060] The AC submerged arc welding device 2 is also used to receive the AC voltage input from the external power supply, convert the AC voltage based on the target welding parameters, and weld the workpiece to be welded according to the target output voltage generated by the conversion.

[0061] It should be noted that the aforementioned current welding parameters can be the parameters currently in operation of the aforementioned AC submerged arc welding device 3, such as speed, current, voltage, frequency, duty cycle, balance, etc. In this embodiment, the aforementioned parameters can be voltage signals or current signals, etc., and the specific signal type can be determined according to the actual structure of the aforementioned welding system.

[0062] It should also be noted that the aforementioned workpiece parameters can be parameters obtained through signal acquisition of the workpiece to be welded, such as the workpiece's material, thickness, shape, size, and welding position. The aforementioned target configuration table can be a data table stored in the welding cloud management platform 1, pre-set based on a large amount of welding experimental data and practical experience, providing corresponding optimal welding parameter configuration schemes for different current welding parameters and workpiece parameters. The aforementioned target welding parameters can be parameters determined according to the target configuration table and workpiece parameters. The aforementioned target output voltage can be the voltage used by the AC submerged arc welding device 2 to weld the workpiece after converting the AC voltage input from the external power supply according to the target welding parameters.

[0063] In its implementation, the AC submerged arc welding device 2 first acquires the current welding parameters and simultaneously collects the workpiece parameters to be welded. It then transmits both the current welding parameters and the workpiece parameters to the welding cloud management platform 1. Upon receiving these parameters, the welding cloud management platform 1 searches the corresponding target configuration table based on the current welding parameters. Combining the workpiece parameters and the target configuration table, it determines the target welding parameters suitable for the current welding operation and sends these parameters back to the AC submerged arc welding device 2. The AC submerged arc welding device 2 receives the AC voltage input from the external power supply and converts the AC voltage according to the received target welding parameters to generate a target output voltage. It then welds the workpiece to be welded according to the converted target output voltage.

[0064] Furthermore, in order to convert the AC voltage input from an external power source, refer to... Figure 2 , Figure 2 This is another structural schematic diagram of the first embodiment of the welding system proposed in this utility model. (See attached diagram.) Figure 2 As shown, in this embodiment, the AC submerged arc welding device 2 further includes: an inverter unit 23, a main control unit 24, and a voltage output unit 26;

[0065] The inverter unit 23 is connected to the external power supply, the main control unit 24 and the voltage output unit 26 respectively, and the voltage output unit 26 is connected to the AC submerged arc welding device 3;

[0066] The main control unit 24 is used to transmit the target welding parameters to the inverter unit 23;

[0067] The inverter unit 23 is used to convert the AC voltage received from the external power supply based on the target welding parameters, and to weld the workpiece to be welded by the voltage output unit according to the converted target output voltage.

[0068] In the specific implementation, when the main control unit 24 receives the target welding parameters from the welding cloud management platform 1, it transmits the target welding parameters to the inverter unit 23. The inverter unit 23, based on the target welding parameters, converts the AC voltage input from the external power supply and transmits the converted target output voltage to the voltage output unit 26. The voltage output unit 26 then welds the workpiece to be welded according to the converted target output voltage.

[0069] Furthermore, in order to obtain the target welding parameters issued by the welding cloud management platform 1, refer to Figure 2 .like Figure 2 As shown, in this embodiment, the AC submerged arc welding device 2 further includes: a networking unit 25;

[0070] The networking unit 25 is connected to the welding cloud management platform 1 and the main control unit 24 respectively;

[0071] The networking unit 25 is used to transmit the current welding parameters and the workpiece parameters to the welding cloud management platform 1;

[0072] The welding cloud management platform 1 is also used to transmit the target welding parameters to the main control unit 24 through the networking unit 25.

[0073] It should be noted that the aforementioned networking unit 25 can be a functional module of the AC submerged arc welding device 2, responsible for establishing a communication connection between the AC submerged arc welding device 2 and the welding cloud management platform 1 to achieve bidirectional data transmission. It typically includes components such as a network interface and communication protocol conversion. The aforementioned welding cloud management platform 1 can be a software platform based on cloud computing technology, serving as the control center and data processing center of the entire welding system. It can receive current welding parameters and workpiece parameters from the AC submerged arc welding device 2, perform data processing and analysis, generate target welding parameters according to preset rules or algorithms, and then send them back to the main control unit 24 of the AC submerged arc welding device 2 via the networking unit 25.

[0074] In its implementation, the AC submerged arc welding device 2 acquires the current welding parameters and the workpiece parameters from the workpiece to be welded, and transmits the acquired current welding parameters and workpiece parameters to the networking unit 25. The networking unit 25 uploads these parameters to the welding cloud management platform 1 via a network connection. Upon receiving these parameters, the welding cloud management platform 1 searches the corresponding target configuration table based on the current welding parameters, and, combining the workpiece parameters and the target configuration table, determines the target welding parameters suitable for the current welding operation. The generated target welding parameters are then sent back to the AC submerged arc welding device 2 via the networking unit 25. The networking unit 25 transmits the received target welding parameters to the main control unit 24 of the AC submerged arc welding device 2. Upon receiving the target welding parameters, the main control unit 24 transmits them to the inverter unit 23. The inverter unit 23 converts the received AC voltage according to the target welding parameters to generate the target output voltage.

[0075] Furthermore, in order to make the welding results more stable, such as... Figure 2 As shown, in this embodiment, the AC submerged arc welding device 2 further includes: a feedback unit 27;

[0076] The feedback unit 27 is connected to the inverter unit 23, the voltage output unit 26 and the main control unit 24 respectively;

[0077] The voltage feedback unit 27 is used to obtain the output voltage value and output current value corresponding to the target output voltage, and transmit the output voltage value and output current value to the main control unit 24;

[0078] The main control unit 24 is also used to adjust the target welding parameters based on the output voltage value and the output current value, and send the adjusted target welding parameters to the inverter unit 23;

[0079] The inverter unit 23 is also used to convert the AC voltage received from the external power supply input based on the adjusted target welding parameters to obtain a new target output voltage, and transmit the new target output voltage to the voltage output unit 26.

[0080] It should be noted that the aforementioned feedback unit 27 may be responsible for monitoring and acquiring the actual output voltage and current values ​​during the welding process, and transmitting these data to the main control unit 24. For example, a Hall sensor may be used as part of the feedback unit 27 to monitor the output current and voltage of the AC submerged arc welding device 2 in real time. The aforementioned output voltage value may be the actual voltage value output by the AC submerged arc welding device 2 during the welding process, reflecting the voltage level of the welding arc. The aforementioned output current value may be the actual current value output by the AC submerged arc welding device 2 during the welding process, reflecting the welding heat input and the weld width and penetration capability.

[0081] In its implementation, inverter unit 23 converts the AC voltage input from the external power supply into a target output voltage based on the target welding parameters transmitted by main control unit 24, and transmits this voltage to voltage output unit 26. Voltage output unit 26 then welds the workpiece according to the target output voltage generated by inverter unit 23. The AC submerged arc welding device 2 performs welding operations on the workpiece according to the target output voltage. Feedback unit 27 acquires the actual output voltage and current values ​​and transmits them to main control unit 24. Main control unit 24 adjusts the target welding parameters based on the output voltage and current values ​​and sends the adjusted parameters to inverter unit 23. Inverter unit 23 inverts the DC voltage based on the adjusted target welding parameters to obtain a new target output voltage and transmits it to voltage output unit 26. Voltage output unit 26 then welds the workpiece according to the new target output voltage.

[0082] This embodiment provides a welding system that can acquire current welding parameters and workpiece parameters of the workpiece to be welded through an AC submerged arc welding device 2, and transmit the current welding parameters and workpiece parameters to a welding cloud management platform 1. The welding cloud management platform 1 obtains a target configuration table based on the current welding parameters, determines the target welding parameters based on the workpiece parameters and the target configuration table, and sends the target welding parameters to the AC submerged arc welding device 2. The AC submerged arc welding device 2 receives AC voltage input from an external power source, converts the AC voltage based on the target welding parameters, and welds the workpiece to be welded according to the converted target output voltage. This utility model achieves automatic determination and adjustment of welding parameters through automatic data acquisition by the AC submerged arc welding device 2 and intelligent parameter determination and distribution by the welding cloud management platform 1. It avoids the complex operation of manually determining welding parameters, simplifies the submerged arc welding process, and improves welding efficiency and quality.

[0083] Furthermore, in order to convert the AC voltage input from an external power source, such as... Figure 2 As shown, in this embodiment, the AC submerged arc welding device 2 further includes: an AC input rectifier unit 21 and a passive filter unit 22;

[0084] The AC input rectifier unit 21 is connected to the external power supply and the passive filter unit 22, and the passive filter unit 22 is connected to the inverter unit 23;

[0085] The AC input rectifier unit 21 is used to rectify the AC voltage received from the external power supply and transmit the obtained DC voltage to the passive filter unit 22.

[0086] The passive filter unit 22 is used to filter the DC voltage and transmit the filtered DC voltage to the inverter unit 23;

[0087] The inverter unit 23 is also used to invert the filtered DC voltage based on the target welding parameters.

[0088] It should be noted that the aforementioned AC input rectifier unit 21 can be a circuit module that converts AC voltage supplied by an external power source into DC voltage, typically composed of electronic components such as rectifier diodes. For example, a common three-phase full-wave rectifier circuit converts three-phase AC voltage into DC voltage through the rectification effect of six diodes. The aforementioned passive filter unit 22 can be a circuit module that filters the rectified DC voltage, reducing the ripple content in the voltage and making the output DC voltage smoother and more stable. It is generally composed of passive components such as inductors and capacitors. For example, an LC filter circuit can effectively filter out high-frequency ripple in the DC voltage through the energy storage of the inductor and the charging and discharging effect of the capacitor.

[0089] In its implementation, the AC input rectifier unit 21 rectifies the received AC voltage, converting it into DC voltage, and transmits the rectified DC voltage to the passive filter unit 22. The passive filter unit 22 filters the DC voltage, removing ripple and making the voltage smoother and more stable, and transmits the filtered DC voltage to the inverter unit 23. The inverter unit 23 converts the DC voltage into the target output voltage according to the target welding parameters.

[0090] Furthermore, the inverter unit 23 also includes: a first inverter subunit 231, a second inverter subunit 233, and a rectifier subunit 232;

[0091] The first inverter sub-unit 231 is connected to the passive filter unit 22 and the second inverter sub-unit 233, and the voltage output unit 26 is also connected to the first inverter sub-unit 231 and the second inverter sub-unit 233 respectively.

[0092] The first inverter subunit 231 is used to perform a first inversion on the filtered DC voltage based on the target welding parameters to obtain a first AC voltage, and transmit the first AC voltage to the rectifier subunit 232.

[0093] The rectifier subunit 232 is used to rectify the primary AC voltage and transmit the generated primary DC voltage to the second inverter subunit 233;

[0094] The second inverter subunit 233 is used to perform a secondary inversion on the primary DC voltage based on the target welding parameters to obtain the target output voltage.

[0095] It should be noted that the first inverter subunit 231 described above is a circuit module that converts the filtered DC voltage into a primary AC voltage. For example, this function can be achieved using an H-bridge circuit composed of IGBTs (Insulated Gate Bipolar Transistors), which converts the DC voltage into AC voltage by controlling the switching action of the IGBTs. The second inverter subunit 233 described above can be a circuit module that further converts the primary DC voltage into the target output voltage. It can also use an H-bridge circuit composed of IGBTs, but its control strategy may differ from that of the first inverter subunit 231 to achieve different output characteristics. The rectifier subunit 232 described above can be a circuit module used to convert a primary AC voltage into a primary DC voltage, typically composed of components such as a diode rectifier bridge. For example, a single-phase full-wave rectifier bridge composed of four diodes can convert a single-phase AC voltage into a DC voltage.

[0096] In its implementation, the passive filter unit 22 transmits the filtered DC voltage to the first inverter subunit 231. The first inverter subunit 231 receives the filtered DC voltage and performs a first inversion based on the target welding parameters to generate an AC voltage, which is then transmitted to the rectifier subunit 232. The rectifier subunit 232 rectifies the AC voltage to generate a DC voltage, which is then transmitted to the second inverter subunit 233. The second inverter subunit 233 receives the DC voltage and performs a second inversion based on the target welding parameters to generate the target output voltage.

[0097] Furthermore, the voltage output unit 26 also includes: a first interface 261 and a second interface 262;

[0098] The first interface 261 is connected to the first inverter sub-unit, and the second interface 262 is connected to the second inverter sub-unit.

[0099] It should be noted that the first interface 261 mentioned above can be an interface in the voltage output unit 26 connected to the first inverter subunit 231 and the AC submerged arc welding device 3, used to transmit the primary AC voltage or related control signals generated by the first inverter subunit 231. For example, it may be a physical connection plug or terminal block, ensuring safe and stable power transmission. The second interface 262 mentioned above can be an interface in the voltage output unit 26 connected to the second inverter subunit 233, used to transmit the target output voltage or related control signals generated by the second inverter subunit 233. Similar to the first interface 261, it is also a key node for power transmission, ensuring the correct welding voltage is obtained.

[0100] In its implementation, the first inverter subunit 231 transmits a primary AC voltage to the first interface 261. The first interface 261 performs welding operations according to the primary AC voltage of the first inverter subunit 231. Although the AC submerged arc welding device 2 primarily performs welding based on the target output voltage of the second interface 262, certain preprocessing or auxiliary functions can be performed using the voltage of the first interface 261. After the second inverter subunit 233 completes secondary inversion according to the target welding parameters, it transmits the generated target output voltage to the second interface 262. The second interface 262 performs welding operations according to the target output voltage.

[0101] Furthermore, referring to Figure 3 , Figure 3 This is a schematic diagram of the third embodiment of the welding system proposed in this utility model. Figure 3 As shown, in this embodiment, the AC input rectifier unit 21 includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, and a sixth diode D6;

[0102] The anode of the first diode D1 is connected to the cathode of the second diode and the external power supply. The cathode of the first diode D1 is connected to the cathode of the third diode D3, the cathode of the fifth diode D5, and the passive filter unit 22. The anode of the second diode D2 is connected to the anode of the fourth diode, the anode of the sixth diode D6, and the passive filter unit 22. The anode of the third diode D3 is connected to the cathode of the fourth diode and the external power supply. The anode of the fifth diode D5 is connected to the cathode of the sixth diode and the external power supply.

[0103] It should be noted that the first to sixth diodes D6 mentioned above can be silicon diodes or germanium diodes, etc., and this embodiment does not limit them.

[0104] In the specific implementation, the anode of the first diode D1 is connected to the cathode of the second diode and the external power supply. The cathode of the first diode D1 is connected to the cathodes of the third diode D3 and the fifth diode D5, as well as the passive filter unit 22. The anode of the second diode D2 is connected to the anodes of the fourth diode and the sixth diode D6, as well as the passive filter unit 22. The anode of the third diode D3 is connected to the cathode of the fourth diode and the external power supply. The anode of the fifth diode D5 is connected to the cathode of the sixth diode and the external power supply. Alternating current flows in through the anodes of the second diode D2, the third diode D3, and the fifth diode D5, while direct current flows out through the cathodes of the second diode D2, the third diode D3, and the fifth diode D5.

[0105] Furthermore, the voltage output unit 26 further includes: a first inductor L1;

[0106] The first end of the first inductor L1 is connected to the first inverter sub-unit 231, and the second end of the first inductor L1 is connected to the first interface 261.

[0107] It should be noted that the first inductor L1 mentioned above can be a toroidal inductor, a coil inductor, etc.

[0108] Furthermore, the passive filter unit 22 includes: a second inductor L2 and a first capacitor C1;

[0109] In a specific implementation, the aforementioned primary AC voltage flows out from the aforementioned first inverter sub-unit 231, passes through the aforementioned first inductor L1, and flows to the first interface 261.

[0110] The first end of the second inductor L2 is connected to the cathode of the fifth diode D5, the third diode D3, and the fifth diode D5. The second end of the second inductor L2 is connected to the first end of the first capacitor C1 and the first inverter unit 23. The second end of the first capacitor C1 is connected to the anode of the second diode D2, the fourth diode D4, and the sixth diode D6 and the first inverter unit 23.

[0111] It should be noted that the first capacitor C1 mentioned above can be a multilayer ceramic capacitor or an electrolytic capacitor, etc. The second inductor L2 mentioned above can be a toroidal inductor, a coil inductor, etc.

[0112] In the specific implementation, the first terminal of the second inductor L2 is connected to the fifth diode D5, the third diode D3, and the cathode of the fifth diode D5. The second terminal of the second inductor L2 is connected to the first terminal of the first capacitor C1 and the first inverter unit 23. The second terminal of the first capacitor C1 is connected to the anode of the second diode D2, the fourth diode D4, and the sixth diode D6, and the first inverter unit 23. The DC current corresponding to the aforementioned DC voltage flows in from the first terminal of the second inductor L2, and then flows into the first inverter subunit 231.

[0113] Furthermore, the rectifier sub-unit 232 also includes: a seventh diode D7, an eighth diode D8, a ninth diode D9, and a tenth diode D10;

[0114] The cathode of the seventh diode D7 is connected to the anode of the eighth diode D8 and the first inverter sub-unit 231. The anode of the seventh diode D7 is connected to the second inverter sub-unit 233 and the anode of the tenth diode D10. The cathode of the eighth diode D8 is connected to the cathode of the ninth diode D9 and the second inverter sub-unit 233. The anode of the ninth diode D9 is connected to the cathode of the tenth diode D10 and the second inverter sub-unit 233.

[0115] It should be noted that the seventh to tenth diodes D10 mentioned above can be silicon diodes or germanium diodes, etc., and this embodiment does not limit them.

[0116] In the specific implementation, the cathode of the seventh diode D7 is connected to the anode of the eighth diode D8 and the first inverter sub-unit 231; the anode of the seventh diode D7 is connected to the second inverter sub-unit 233 and the anode of the tenth diode D10; the cathode of the eighth diode D8 is connected to the cathode of the ninth diode D9 and the second inverter sub-unit 233; and the anode of the ninth diode D9 is connected to the cathode of the tenth diode D10 and the second inverter sub-unit 233. The current corresponding to the primary AC voltage flows into the eighth diode D8 and the anode of the ninth diode D9, and flows out through the cathode of the seventh diode D7 and the anode of the tenth diode D10, corresponding to the primary DC voltage, and flows to the second inverter sub-unit 233.

[0117] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding system, characterized in that, The system includes: an AC submerged arc welding device and a welding cloud management platform; the AC submerged arc welding device is connected to the welding cloud management platform and an external power supply respectively; The AC submerged arc welding device is used to acquire the current welding parameters corresponding to the AC submerged arc welding device and the workpiece parameters of the workpiece to be welded, and to transmit the current welding parameters and the workpiece parameters to the welding cloud management platform. The welding cloud management platform is used to obtain a target configuration table based on the current welding parameters, determine target welding parameters based on the workpiece parameters and the target configuration table, and send the target welding parameters to the AC submerged arc welding device. The AC submerged arc welding device is also used to receive the AC voltage input from the external power supply, convert the AC voltage based on the target welding parameters, and weld the workpiece to be welded according to the target output voltage generated by the conversion.

2. The system as described in claim 1, characterized in that, The AC submerged arc welding device also includes: an inverter unit, a main control unit, and a voltage output unit; The inverter unit is connected to the external power supply, the main control unit, and the voltage output unit, respectively. The voltage output unit is connected to the AC submerged arc welding device. The main control unit is used to transmit the target welding parameters to the inverter unit; The inverter unit is used to convert the received AC voltage from the external power supply based on the target welding parameters, and to weld the workpiece to be welded by the voltage output unit according to the converted target output voltage.

3. The system as described in claim 2, characterized in that, The AC submerged arc welding device also includes: an AC input rectifier unit and a passive filter unit; The AC input rectifier unit is connected to the external power supply and the passive filter unit, and the passive filter unit is connected to the inverter unit; The AC input rectifier unit is used to rectify the AC voltage received from the external power supply and transmit the obtained DC voltage to the passive filter unit. The passive filtering unit is used to filter the DC voltage and transmit the filtered DC voltage to the inverter unit; The inverter unit is also used to invert the filtered DC voltage based on the target welding parameters.

4. The system as described in claim 3, characterized in that, The AC input rectifier unit includes: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, and a sixth diode; The anode of the first diode is connected to the cathode of the second diode and the external power supply. The cathode of the first diode is connected to the cathode of the third diode, the cathode of the fifth diode and the passive filter unit. The anode of the second diode is connected to the anode of the fourth diode, the anode of the sixth diode and the passive filter unit. The anode of the third diode is connected to the cathode of the fourth diode and the external power supply. The anode of the fifth diode is connected to the cathode of the sixth diode and the external power supply.

5. The system as described in claim 3, characterized in that, The inverter unit further includes: a first inverter subunit, a second inverter subunit, and a rectifier subunit; The first inverter sub-unit is connected to the passive filter unit and the second inverter sub-unit, and the voltage output unit is also connected to the first inverter sub-unit and the second inverter unit respectively; The first inverter subunit is used to perform a first inversion on the filtered DC voltage based on the target welding parameters to obtain a first AC voltage, and transmit the first AC voltage to the rectifier subunit; The rectifier subunit is used to rectify the primary AC voltage and transmit the generated primary DC voltage to the second inverter subunit; The second inverter sub-unit is used to perform a secondary inversion on the primary DC voltage based on the target welding parameters to obtain the target output voltage.

6. The system as described in claim 5, characterized in that, The rectifier subunit also includes: a seventh diode, an eighth diode, a ninth diode, and a tenth diode; The cathode of the seventh diode is connected to the anode of the eighth diode and the first inverter sub-unit. The anode of the seventh diode is connected to the second inverter sub-unit and the anode of the tenth diode. The cathode of the eighth diode is connected to the cathode of the ninth diode and the second inverter sub-unit. The anode of the ninth diode is connected to the cathode of the tenth diode and the second inverter sub-unit.

7. The system as described in claim 5, characterized in that, The voltage output unit further includes: a first interface and a second interface; The first interface is connected to the first inverter sub-unit, and the second interface is connected to the second inverter sub-unit.

8. The system as described in claim 7, characterized in that, The voltage output unit further includes: a first inductor; The first end of the first inductor is connected to the first inverter sub-unit, and the second end of the first inductor is connected to the first interface.

9. The system as described in claim 2, characterized in that, The AC submerged arc welding device also includes: a networking unit; The networking unit is connected to both the welding cloud management platform and the main control unit. The networking unit is used to transmit the current welding parameters and the workpiece parameters to the welding cloud management platform; The welding cloud management platform is also used to transmit the target welding parameters to the main control unit through the networking unit.

10. The system as described in claim 9, characterized in that, The AC submerged arc welding device also includes: a feedback unit; The feedback unit is connected to the inverter unit, the voltage output unit, and the main control unit, respectively. The voltage feedback unit is used to acquire the output voltage value and output current value corresponding to the target output voltage, and transmit the output voltage value and output current value to the main control unit; The main control unit is also used to adjust the target welding parameters based on the output voltage value and the output current value, and send the adjusted target welding parameters to the inverter unit; The inverter unit is also used to convert the AC voltage received from the external power supply input based on the adjusted target welding parameters to obtain a new target output voltage, and transmit the new target output voltage to the voltage output unit.

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