Detection and calibration device for direct-current electric welding machine

Abstract

The invention provides a detection and calibration device for a direct-current electric welding machine, and relates to the technical field of welding operation. The detection and calibration device for the direct-current electric welding machine comprises a load resistor, a voltage detection assembly, a current detection assembly and a load access switch. The load resistor, the current detection assembly and the load access switch are connected in series to form a load branch, and two ends of the load branch are respectively connected with a first conductive part and a second conductive part; the first conductive part and the second conductive part are electrically connected with the positive and negative electrodes of the to-be-tested direct-current electric welding machine respectively; the two ends of the voltage detection assembly are electrically connected with the first conductive part and the second conductive part respectively. When the detection and calibration device for the direct-current electric welding machine is used, the load voltage, the welding current and the no-load voltage of the direct-current electric welding machine to be detected can be detected in sequence only by connecting the first conductive part and the second conductive part with the positive electrode and the negative electrode of the direct-current electric welding machine to be detected respectively and then controlling the on-off state of the load access switch, and frequent wiring is not needed; and the operation convenience and safety of the device are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding operations, in particular to a detection and calibration device for a direct current welding machine. Background Art

[0002] DC welding machines are widely used in the construction and installation industry. Since the accuracy of the output voltage and output current of a DC welding machine directly affects the welding quality, the parameters such as the no-load voltage, load voltage and welding current of the DC welding machine need to be tested and calibrated before using the DC welding machine.

[0003] At present, the detection and calibration process of the DC welding machine is usually to connect the load box and the DC welding machine in series to form a welding circuit at the welding site, and then use a voltmeter to detect the no-load voltage of the DC welding machine (that is, the voltage between the two ends of the DC welding machine when the welding circuit is in an open circuit and the welding power supply on the DC welding machine does not supply power to the load box) and the load voltage (that is, the voltage between the two ends of the DC welding machine when the welding circuit is in a passage), and use an ammeter to detect the welding current of the DC welding machine (that is, the current output by the welding power supply on the DC welding machine when the welding circuit is in a passage). Since the load box can not only withstand the welding current during detection, but also can make the load voltage change within a specified range, the load box can also be used to calibrate the load voltage and welding current during the detection process so that the load voltage and welding current are within the allowable error range.

[0004] However, instruments such as voltmeters, ammeters and load boxes are relatively scattered and bulky, which is not conducive to carrying on-site, and the wiring is relatively complicated, which makes it easy for workers to connect the wrong wires, thereby causing damage to personnel and equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a detection and calibration device for a DC welding machine, so as to alleviate the technical problem that when detecting and calibrating the no-load voltage, load voltage and welding current of the DC welding machine in the prior art, a load box needs to be connected in series in the welding circuit of the DC welding machine and a power supply, and then a voltmeter and an ammeter are used to detect the above parameters respectively. However, the voltmeter, ammeter and load box are relatively scattered and bulky, which is not conducive to on-site carrying, and the wiring is relatively complicated, which makes it easy for workers to connect the wrong wires, thereby causing damage to personnel and equipment.

[0006] In a first aspect, the present invention provides a detection and calibration device for a DC welding machine, comprising a load resistor, a voltage detection component, a current detection component and a load access switch;

[0007] The load resistor, the current detection component and the load access switch are connected in series to form a load branch, one end of the load branch is connected to a first conductive member, and the other end is connected to a second conductive member; the first conductive member and the second conductive member are used to be electrically connected to the positive electrode and the negative electrode of the DC welding machine to be tested, respectively, and the load access switch is used to open and close to control the on-off of the circuit between the load branch and the DC welding machine to be tested;

[0008] One end of the voltage detection component is electrically connected to the first conductive member, and the other end is electrically connected to the second conductive member.

[0009] In an optional embodiment, it also includes a no-load voltage test module and a transfer switch assembly;

[0010] The no-load voltage test module comprises an input end and an output end, and the input end and the output end of the no-load voltage test module are respectively electrically connected to the first conductive member and the second conductive member through a third conductive member to form a no-load branch circuit that can be connected in parallel between the positive and negative electrodes of the DC welding machine to be tested;

[0011] The no-load branch is connected to the conversion switch assembly, and the conversion switch assembly is used to disconnect the circuit between the no-load branch and the DC welding machine to be tested when the load access switch is closed, and to conduct the circuit between the no-load branch and the DC welding machine to be tested when the load access switch is disconnected.

[0012] In an optional embodiment, the voltage detection component and the no-load voltage test module both include an input end and an output end;

[0013] The input end and the output end of the voltage detection component are electrically connected to the first conductive member and the second conductive member through a fourth conductive member, respectively, to form a load voltage detection branch that can be connected in parallel between the positive and negative electrodes of the DC welding machine to be tested;

[0014] The input end and the output end of the voltage detection component are also electrically connected to the output end and the input end of the no-load voltage test module through a fifth conductive member, so as to form a no-load voltage detection branch connected in parallel between the input end and the output end of the no-load voltage test module;

[0015] The load voltage detection branch and the no-load voltage detection branch are both connected to the conversion switch assembly, and the conversion switch assembly is used to connect the circuit between the load voltage detection branch and the DC welding machine to be tested, and disconnect the circuit between the no-load voltage detection branch and the no-load voltage test module when the load access switch is closed; and to disconnect the circuit between the load voltage detection branch and the DC welding machine to be tested, and connect the circuit between the no-load voltage detection branch and the no-load voltage test module when the load access switch is disconnected.

[0016] In an optional embodiment, the transfer switch assembly includes a no-load position, a zero position, and a load position;

[0017] In the no-load position, the conversion switch assembly conducts the circuit between the no-load branch and the DC welding machine to be tested, conducts the circuit between the no-load voltage detection branch and the no-load voltage test module, and disconnects the circuit between the load voltage detection branch and the DC welding machine to be tested;

[0018] In the zero gear position, the conversion switch assembly disconnects the circuit between the no-load branch and the DC welding machine to be tested, disconnects the circuit between the no-load voltage detection branch and the no-load voltage test module, and disconnects the circuit between the load voltage detection branch and the DC welding machine to be tested;

[0019] Under the load gear, the conversion switch assembly disconnects the circuit between the no-load branch and the DC welding machine to be tested, disconnects the circuit between the no-load voltage detection branch and the no-load voltage test module, and connects the circuit between the load voltage detection branch and the DC welding machine to be tested.

[0020] In an optional embodiment, it further includes a power supply module and a power supply switch;

[0021] The power supply module is electrically connected to the load access switch, and the power supply switch is electrically connected to the power supply module. The power supply switch is used to control the power supply module to supply power to the load access switch when closed, so that the load access switch is closed; and to control the power supply module to stop supplying power to the load access switch when disconnected, so that the load access switch is disconnected;

[0022] The power switch is a wireless remote control switch and / or a button switch.

[0023] In an optional implementation, the load resistor is a variable resistor.

[0024] In an optional embodiment, a recorder is also included;

[0025] The voltage detection component and the current detection component are both electrically connected to the recorder. The voltage detection component is used to send the voltage information it detects to the recorder, and the current detection component is used to send the current information it detects to the recorder. The recorder is used to record and display the voltage information and current information it receives.

[0026] In an optional implementation, a fan is further included, and the fan is installed on one side of the load resistor to dissipate heat from the load resistor.

[0027] In an optional embodiment, a mobile power source is further included, and the mobile power source is used to connect to the recorder to supply power to the recorder.

[0028] In an optional embodiment, a box is further included, and the load resistor, the voltage detection component, the current detection component and the load access switch are all installed in the box.

[0029] The detection and calibration device for a DC welding machine provided by the present invention comprises a load resistor, a voltage detection component, a current detection component and a load access switch; the load resistor, the current detection component and the load access switch are connected in series to form a load branch, one end of the load branch is connected to a first conductive member, and the other end is connected to a second conductive member; the first conductive member and the second conductive member are used to be electrically connected to the positive and negative poles of the DC welding machine to be tested, respectively, and the load access switch is used to open and close to control the on and off of the circuit between the load branch and the DC welding machine to be tested; one end of the voltage detection component is electrically connected to the first conductive member, and the other end is electrically connected to the second conductive member. The detection and calibration device for a DC welding machine provided by the present invention is used to detect and calibrate parameters such as the no-load voltage, load voltage and welding current of the DC welding machine. During use, the first conductive member and the second conductive member can be electrically connected to the positive and negative poles of the DC welding machine to be tested, respectively, at which time the load branch and the DC welding machine to be tested form a circuit through the first conductive member and the second conductive member, and the voltage detection component is connected in parallel between the positive and negative poles of the DC welding machine to be tested through the first conductive member and the second conductive member. Then the load access switch can be kept in the disconnected state. When the load access switch is disconnected, the loop between the load branch and the DC welding machine to be tested is disconnected. At this time, the voltage detection component can be connected in parallel between the positive and negative poles of the DC welding machine to be tested through the first conductive member and the second conductive member, so as to detect the voltage between the positive and negative poles of the DC welding machine to be tested, and obtain the no-load voltage of the DC welding machine under the no-load state. After the no-load voltage detection is completed, the load access switch is closed again. At this time, the loop between the load branch and the DC welding machine to be tested is connected, and the current detection component can detect the current output by the DC welding machine under the load state, so as to obtain the welding current value. At the same time, the voltage detection component can detect the voltage between the positive and negative poles of the DC welding machine to be tested, so as to obtain the load voltage value of the DC welding machine under the load state. It should be noted that the load resistor in the present invention can also make the load voltage of the DC welding machine change within a specified range, so that the load voltage and welding current can be calibrated by the load resistor during the detection process so that the load voltage and welding current are within the allowable error range.

[0030] Compared with the prior art, the detection and calibration device for a DC welding machine provided by the present invention can not only integrate the load resistance, the voltage detection component and the current detection component together, and is easy to carry, but also during use, only the first conductive member and the second conductive member need to be connected to the positive and negative poles of the DC welding machine to be tested respectively, and then the on and off of the load access switch can be controlled to successively detect the load voltage, welding current and no-load voltage of the DC welding machine to be tested, without the need for frequent wiring on site, which effectively simplifies the on-site operation steps, can not only improve the convenience of device operation, but also reduce wiring errors, thereby improving the safety of device use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of a detection and calibration device for a DC welding machine provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the internal structure of a detection and calibration device for a DC welding machine provided in an embodiment of the present invention;

[0034] Figure 3 Another schematic diagram of the internal structure of the detection and calibration device for a DC welding machine provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of another internal structure of the detection and calibration device for a DC welding machine provided in an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the circuit connection of a detection and calibration device for a DC welding machine provided in an embodiment of the present invention;

[0037] Figure 6 A schematic structural diagram of a first conductive member provided in an embodiment of the present invention;

[0038] Figure 7 A schematic structural diagram of a second conductive member provided in an embodiment of the present invention;

[0039] Figure 8 A schematic diagram of the structure of a first conductive member and a second conductive member provided in an embodiment of the present invention;

[0040] Fig. 9 A schematic diagram of the structure of a mobile power supply provided by an embodiment of the present invention.

[0041] Icons: 1-load branch; 10-load resistor; 11-current detection component; 12-load access switch; 120-power supply module; 121-wireless remote control switch; 122-button switch; 2-voltage detection component; 20-fourth conductive member; 200-load voltage detection branch; 21-fifth conductive member; 210-no-load voltage detection branch; 3-first conductive member; 4-second conductive member; 5-DC welding machine; 6-box; 60-roller; 61- Positive electrode interface; 62-negative electrode interface; 63-resistance adjustment switch; 64-fan switch; 65-overtemperature alarm light; 66-power interface; 67-power switch; 68-gear adjustment switch; 7-no-load branch; 70-no-load voltage test module; 71-third conductive part; 8-conversion switch assembly; 800-no-load switch; 801-load voltage detection switch; 802-no-load voltage detection switch; 90-recorder; 91-fan; 92-mobile power supply. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0045] Example:

[0046] like Figure 1-Figure 5As shown, the detection and calibration device for a DC welding machine provided in this embodiment includes a load resistor 10, a voltage detection component 2, a current detection component 11 and a load access switch 12; the load resistor 10, the current detection component 11 and the load access switch 12 are connected in series to form a load branch 1, one end of the load branch 1 is connected to a first conductive member 3, and the other end is connected to a second conductive member 4; the first conductive member 3 and the second conductive member 4 are used to be electrically connected to the positive and negative poles of the DC welding machine 5 to be tested, respectively, and the load access switch 12 is used to open and close to control the on-off of the circuit between the load branch 1 and the DC welding machine 5 to be tested; one end of the voltage detection component 2 is electrically connected to the first conductive member 3, and the other end is electrically connected to the second conductive member 4.

[0047] The detection and calibration device for a DC welding machine provided in this embodiment is used to detect and calibrate parameters such as the no-load voltage, load voltage and welding current of the DC welding machine 5. During use, the first conductive member 3 and the second conductive member 4 can be electrically connected to the positive and negative electrodes of the DC welding machine 5 to be tested, respectively. At this time, the load branch 1 and the DC welding machine 5 to be tested form a loop through the first conductive member 3 and the second conductive member 4, and the voltage detection component 2 is connected in parallel between the positive and negative electrodes of the DC welding machine 5 to be tested through the first conductive member 3 and the second conductive member 4.

[0048] Then, the load access switch 12 can be kept in the disconnected state. When the load access switch 12 is disconnected, the loop between the load branch 1 and the DC welding machine 5 to be tested is disconnected. At this time, the voltage detection component 2 can be connected in parallel between the positive and negative poles of the DC welding machine 5 to be tested through the first conductive member 3 and the second conductive member 4, thereby detecting the voltage between the positive and negative poles of the DC welding machine 5 to be tested, and obtaining the no-load voltage of the DC welding machine 5 in the no-load state.

[0049] After the no-load voltage detection is completed, the load access switch 12 is closed, and the loop between the load branch 1 and the DC welding machine 5 to be tested is connected. The current detection component 11 can detect the current output by the DC welding machine 5 under the load state, thereby obtaining the welding current value. At the same time, the voltage detection component 2 can detect the voltage between the positive and negative electrodes of the DC welding machine 5 to be tested, thereby obtaining the load voltage value of the DC welding machine 5 under the load state.

[0050] It should be noted that the load resistor 10 in the present invention can also make the load voltage of the DC welding machine 5 vary within a specified range. Therefore, during the detection process, the load resistor 10 can be used to calibrate the load voltage and welding current so that the load voltage and welding current are within the allowable error range.

[0051] Compared with the prior art, the detection and calibration device for a DC welding machine provided in this embodiment can not only integrate the load resistor 10, the voltage detection component 2 and the current detection component 11 together, and is easy to carry, but also during use, only the first conductive member 3 and the second conductive member 4 need to be connected to the positive and negative poles of the DC welding machine 5 to be tested, respectively, and then the on and off of the load access switch 12 can be controlled to detect the load voltage, welding current and no-load voltage of the DC welding machine 5 to be tested in sequence, without the need for frequent wiring on site, which effectively simplifies the on-site operation steps, can not only improve the convenience of device operation, but also can reduce wiring errors, thereby improving the safety of device use.

[0052] There is no limitation on the specific structures of the first conductive member 3 and the second conductive member 4 as long as the conductive function can be achieved. For example, the first conductive member 3 and the second conductive member 4 can both be wires.

[0053] In order to improve the convenience of using the first conductive member 3 and the second conductive member 4, Figure 6 and Figure 7 As shown, in this embodiment, preferably, the first conductive member 3 and the second conductive member 4 are both quick-connect conversion fixtures with a conductive clip at one end, or, as shown in FIG. Figure 8 As shown, the first conductive member 3 and the second conductive member 4 are both quick-connect wires with plugs at the ends.

[0054] In addition, there is no limitation on the specific structures of the current detection component 11 and the voltage detection component 2. For example, the current detection component 11 can be an ammeter, and the voltage detection component 2 can be a voltmeter. In this embodiment, the current detection component 11 is preferably a Hall current transmitter, and the voltage detection component 2 is a voltage transmitter.

[0055] like Figure 1-Figure 4 As shown, the detection and calibration device for a DC welding machine provided in this embodiment also includes a box 6, and a load resistor 10, a voltage detection component 2, a current detection component 11 and a load access switch 12 are all installed in the box 6.

[0056] The box body 6 can make the structures of various parts of the detection and calibration device for the DC welding machine more compact, further improve the integration of the load resistor 10, the voltage detection component 2, the current detection component 11 and the load access switch 12, thereby further improving the ease of use of the detection and calibration device for the DC welding machine.

[0057] Furthermore, a roller 60 may be provided at the bottom of the box 6, and the roller 60 is used to improve the mobility of the box 6, thereby improving the mobility of the detection and calibration device for the DC welding machine.

[0058] The roller 60 may be a universal wheel.

[0059] When the DC welding machine detection and calibration device provided in this embodiment further includes a box 6, as shown in FIG. Figure 2 and Figure 3 As shown, the box body 6 may also be provided with a positive electrode interface 61 and a negative electrode interface 62. At this time, the input end of the load branch 1 and the end of the voltage detection component 2 close to the first conductive member 3 are connected at one point, and the positive electrode interface 61 is provided at the connection point; correspondingly, the output end of the load branch 1 and the end of the voltage detection component 2 close to the second conductive member 4 are connected at one point, and the negative electrode interface 62 is provided at the connection point. When one end of the first conductive member 3 is plugged into the positive electrode interface 61, the input end of the load branch 1 and the voltage detection component 2 are both electrically connected to the first conductive member 3; when one end of the second conductive member 4 is plugged into the negative electrode interface 62, the output end of the load branch 1 and the voltage detection component 2 are both electrically connected to the second conductive member 4.

[0060] It can be seen that the positive electrode interface 61 and the negative electrode interface 62 can improve the convenience of the electrical connection process between the load branch 1 and the first conductive member 3 and the second conductive member 4, and improve the convenience of the electrical connection process between the voltage detection component 2 and the first conductive member 3 and the second conductive member 4.

[0061] like Figure 2 and Figure 5 As shown, the detection and calibration device for DC welding machine provided in this embodiment also includes a no-load voltage test module 70 and a conversion switch assembly 8; Figure 5 As shown, the no-load voltage test module 70 includes an input end and an output end, and the input end and the output end of the no-load voltage test module 70 are electrically connected to the first conductive member 3 and the second conductive member 4 through the third conductive member 71, respectively, to form a no-load branch 7 that can be connected in parallel between the positive and negative poles of the DC welding machine 5 to be tested; the no-load branch 7 is connected to the conversion switch assembly 8, and the conversion switch assembly 8 is used to disconnect the loop between the no-load branch 7 and the DC welding machine 5 to be tested when the load access switch 12 is closed, and to conduct the loop between the no-load branch 7 and the DC welding machine 5 to be tested when the load access switch 12 is disconnected.

[0062] When the load access switch 12 is closed, the loop between the load branch 1 and the DC welding machine 5 to be tested is connected. At this time, the DC welding machine 5 to be tested is in a load state. In order not to hinder the current and voltage detection process of the DC welding machine 5 to be tested under the load state, the conversion switch component 8 can disconnect the loop between the no-load branch 7 and the DC welding machine 5 to be tested to avoid burning of components.

[0063] When the load access switch 12 is disconnected, the circuit between the load branch 1 and the DC welding machine 5 to be tested is disconnected. At this time, the DC welding machine 5 to be tested is in a no-load state. In order to protect the circuit between the DC welding machine 5 to be tested and the voltage detection component 2, the conversion switch component 8 can connect the circuit between the no-load branch 7 and the DC welding machine 5 to be tested, so that the resistance of the no-load voltage test module 70 is connected to the circuit. It should be noted that, since the voltage detection component 2 is still connected in parallel to the positive and negative electrodes of the DC welding machine 5 to be tested through the first conductive member 3 and the second conductive member 4 at this time, the voltage detection component 2 can normally measure the voltage between the positive and negative electrodes of the DC welding machine 5 to be tested in the no-load state, that is, the no-load voltage.

[0064] The no-load voltage test module 70 is an existing structure, which has a built-in resistor for protecting the circuit when testing the no-load voltage.

[0065] It should also be noted that the built-in resistor of the no-load voltage test module 70 may be an adjustable resistor, such as Figure 2 As shown, at this time, the side wall of the box body 6 can be provided with a resistance adjustment switch 63 for adjusting the resistance value of the above-mentioned built-in resistor. Based on this, when detecting the no-load voltage of the DC welding machine 5, the resistance value of the no-load voltage test module 70 can also be adjusted in real time according to the detection result of the voltage detection component 2 to calibrate the no-load voltage.

[0066] Further, such as Figure 5 As shown, the voltage detection component 2 and the no-load voltage test module 70 both include an input end and an output end; the input end and the output end of the voltage detection component 2 are electrically connected to the first conductive member 3 and the second conductive member 4 through the fourth conductive member 20, respectively, to form a load voltage detection branch 200 that can be connected in parallel between the positive and negative electrodes of the DC welding machine 5 to be tested; the input end and the output end of the voltage detection component 2 are also electrically connected to the output end and the input end of the no-load voltage test module 70 through the fifth conductive member 21, respectively, to form a no-load voltage detection branch 200 connected in parallel between the input end and the output end of the no-load voltage test module 70. The load voltage detection branch 200 and the no-load voltage detection branch 210 are both connected to the conversion switch assembly 8, and the conversion switch assembly 8 is used to connect the loop between the load voltage detection branch 200 and the DC welding machine 5 to be tested, and disconnect the loop between the no-load voltage detection branch 210 and the no-load voltage test module 70 when the load access switch 12 is closed; and, to disconnect the loop between the load voltage detection branch 200 and the DC welding machine 5 to be tested, and connect the loop between the no-load voltage detection branch 210 and the no-load voltage test module 70 when the load access switch 12 is disconnected.

[0067] The fourth conductive member 20 and the voltage detection assembly 2 form a load voltage detection branch 200, and the load voltage detection branch 200 is connected in parallel between the positive and negative electrodes of the DC welding machine 5. The fifth conductive member 21 and the voltage detection assembly 2 form a no-load voltage detection branch 210, and the no-load voltage detection branch 210 is connected in parallel between the input end and the output end of the no-load voltage test module 70.

[0068] When the load access switch 12 is closed, that is, when the DC welding machine 5 to be tested is in a load state, the conversion switch assembly 8 can not only disconnect the loop between the no-load branch 7 and the DC welding machine 5 to be tested, but also connect the loop between the load voltage detection branch 200 and the DC welding machine 5 to be tested, and disconnect the loop between the no-load voltage detection branch 210 and the no-load voltage test module 70, thereby preventing the no-load voltage test module 70 from being connected to the circuit.

[0069] When the load access switch 12 is disconnected, that is, when the DC welding machine 5 to be tested is in a no-load state, the conversion switch assembly 8 can not only connect the loop between the no-load branch 7 and the DC welding machine 5 to be tested, but also disconnect the loop between the load voltage detection branch 200 and the DC welding machine 5 to be tested, and connect the loop between the no-load voltage detection branch 210 and the no-load voltage test module 70, thereby preventing the load resistor 10 from being connected to the circuit and affecting the detection result.

[0070] Among them, the specific structure of the conversion switch assembly 8 is not limited. For example, the conversion switch assembly 8 can be composed of multiple manual switches. However, since multiple manual switches will increase the complexity of operation, the conversion switch assembly 8 in this embodiment preferably includes a no-load position, a zero position and a load position.

[0071] In the no-load position, the switching switch assembly 8 connects the circuit between the no-load branch 7 and the DC welding machine 5 to be tested, connects the circuit between the no-load voltage detection branch 210 and the no-load voltage test module 70, and disconnects the circuit between the load voltage detection branch 200 and the DC welding machine 5 to be tested.

[0072] In the zero gear position, the switching switch assembly 8 disconnects the circuit between the no-load branch 7 and the DC welding machine 5 to be tested, disconnects the circuit between the no-load voltage detection branch 210 and the no-load voltage test module 70, and disconnects the circuit between the load voltage detection branch 200 and the DC welding machine 5 to be tested.

[0073] Under the load position, the switching assembly 8 disconnects the circuit between the no-load branch 7 and the DC welding machine 5 to be tested, disconnects the circuit between the no-load voltage detection branch 210 and the no-load voltage test module 70, and connects the circuit between the load voltage detection branch 200 and the DC welding machine 5 to be tested.

[0074] Among them, the no-load gear corresponds to the no-load state of the DC welding machine 5 to be tested, the zero gear corresponds to the disconnected (ie non-working) state of the voltage detection component 2, and the load gear corresponds to the load state of the DC welding machine 5 to be tested.

[0075] Specifically, when it is necessary to detect the no-load voltage, the load access switch 12 can be disconnected, and the conversion switch assembly 8 can be switched to the no-load position. At this time, the load access switch 12 will disconnect the circuit between the load branch 1 and the DC welding machine 5 to be tested. At the same time, the conversion switch assembly 8 will automatically connect the circuit between the no-load branch 7 and the DC welding machine 5 to be tested, connect the circuit between the no-load voltage detection branch 210 and the no-load voltage test module 70, and disconnect the circuit between the load voltage detection branch 200 and the DC welding machine 5 to be tested, thereby realizing the no-load voltage detection process.

[0076] When there is no need to detect the no-load voltage and the load voltage, the conversion switch assembly 8 can be switched to the zero position. At this time, the conversion switch assembly 8 will automatically disconnect the loop between the no-load branch 7 and the DC welding machine 5 to be tested, disconnect the loop between the no-load voltage detection branch 210 and the no-load voltage test module 70, and disconnect the loop between the load voltage detection branch 200 and the DC welding machine 5 to be tested.

[0077] When it is necessary to detect the load voltage, the load access switch 12 can be closed and the conversion switch assembly 8 can be switched to the load position. At this time, the load access switch 12 will connect the circuit between the load branch 1 and the DC welding machine 5 to be tested. At the same time, the conversion switch assembly 8 will automatically disconnect the circuit between the no-load branch 7 and the DC welding machine 5 to be tested, disconnect the circuit between the no-load voltage detection branch 210 and the no-load voltage test module 70, and connect the circuit between the load voltage detection branch 200 and the DC welding machine 5 to be tested, thereby realizing the detection process of the load voltage and welding current.

[0078] like Figure 5 As shown, based on the above-mentioned no-load position, zero position and load position, a no-load switch 800, a load voltage detection switch 801 and a no-load voltage detection switch 802 can be set respectively, the no-load switch 800 is arranged on the third conductive member 71, the load voltage detection switch 801 is arranged on the fourth conductive member 20, and the no-load voltage detection switch 802 is arranged on the fifth conductive member 21; in the no-load position, the no-load switch 800 and the no-load voltage detection switch 802 are both closed, and the load voltage detection switch 801 is disconnected; in the zero position, the no-load switch 800, the no-load voltage detection switch 802 and the load voltage detection switch 801 are all disconnected; in the load position, the no-load switch 800 and the no-load voltage detection switch 802 are both disconnected, and the load voltage detection switch 801 is closed.

[0079] In order to make each switch in the conversion switch assembly 8 automatically open and close, the no-load switch 800, the load voltage detection switch 801 and the no-load voltage detection switch 802 can be composed of multiple contacts. In this case, two contacts arranged at intervals can be provided on each third conductive member 71 to serve as the no-load switch 800. When the two contacts on the third conductive member 71 are turned on or off, the no-load switch 800 is closed or opened; two contacts arranged at intervals are provided on each fourth conductive member 20 to serve as the load voltage detection switch 801. When the two contacts on the fourth conductive member 20 are turned on or off, the load voltage detection switch 801 is closed or opened; two contacts arranged at intervals are provided on each fifth conductive member 21 to serve as the no-load voltage detection switch 802. When the two contacts on the fifth conductive member 21 are turned on or off, the no-load voltage detection switch 802 is closed or opened.

[0080] Furthermore, the conversion switch assembly 8 can adopt a four-section three-speed switch converter.

[0081] It can be seen that the detection and calibration device for a DC welding machine provided in this embodiment can also have a one-key conversion detection function for no-load voltage and load voltage, avoiding rewiring, and further effectively improving the ease of use of the detection and calibration device for a DC welding machine.

[0082] like Figure 2 and Figure 3 As shown, the detection and calibration device for a DC welding machine provided in this embodiment also includes a power supply module 120 and a power supply switch; the power supply module 120 is electrically connected to the load access switch 12, and the power supply switch is electrically connected to the power supply module 120, and the power supply switch is used to control the power supply module 120 to supply power to the load access switch 12 when closed, so that the load access switch 12 is closed; and is used to control the power supply module 120 to stop supplying power to the load access switch 12 when disconnected, so that the load access switch 12 is disconnected; the power supply switch is a wireless remote control switch 121 or a button switch 122, or the power supply switch includes the wireless remote control switch 121 and the button switch 122, and both the wireless remote control switch 121 and the button switch 122 can control the power supply module 120 to supply power to the load access switch 12 or stop supplying power.

[0083] The power supply module 120 can be controlled to supply or stop supplying power to the load access switch 12 by manually operating the button switch 122 or remotely controlling the wireless remote control switch 121 , thereby closing or opening the load access switch 12 .

[0084] It can be seen that the power supply module 120 and the power supply switch can cooperate with each other to control the working process of the load access switch 12. When the load access switch 12 is installed in the box 6, the operating convenience of the load access switch 12 can be effectively improved.

[0085] In addition, when the load access switch 12 is installed in the box 6 , the power supply module 120 and the wireless remote control switch 121 can both be installed in the box 6 , and the button switch 122 is installed on the side wall of the box 6 .

[0086] The load access switch 12 can be closed or opened by supplying power to or stopping power from the power supply module 120 . The load access switch 12 can be a relay.

[0087] Furthermore, in this embodiment, the load access switch 12 is preferably a high-current relay. In this case, the load access switch 12 can effectively control the high current to generate an arc when the load branch 1 is turned on and off.

[0088] In this embodiment, the load resistor 10 is preferably a variable resistor, such as Figure 2 As shown, at this time, the side wall of the box body 6 can also be provided with a gear adjustment switch 68 for adjusting the resistance value of the load resistor 10. The gear adjustment switch 68 can be provided with multiple buttons, and the multiple buttons correspond to multiple different resistance values. By pressing the button, the resistance value corresponding to the button can be connected to the circuit, thereby realizing the resistance adjustment of the load resistor 10. It can be seen that the setting of the gear adjustment switch 68 can further improve the convenience of adjusting the resistance value, thereby effectively improving the convenience of using the DC welding machine.

[0089] like Figure 2 As shown, the detection and calibration device for a DC welding machine provided in this embodiment also includes a recorder 90; the voltage detection component 2 and the current detection component 11 are both electrically connected to the recorder 90, the voltage detection component 2 is used to send the voltage information detected by it to the recorder 90, the current detection component 11 is used to send the current information detected by it to the recorder 90, and the recorder 90 is used to record and display the voltage information and current information it receives.

[0090] The recorder 90 is equipped with a control panel capable of processing voltage information and current information, and its outer wall is also provided with a display screen for displaying voltage information and current information.

[0091] The recorder 90 can not only record the above voltage information and current information to facilitate tracing historical data, but also display the above voltage information and current information so that the staff can know the test results in time and facilitate the staff to carry out subsequent calibration processes.

[0092] The recorder 90 may be a multi-channel paperless recorder.

[0093] like Figure 2 and Figure 3 As shown, the detection and calibration device for a DC welding machine provided in this embodiment further includes a fan 91 , which is installed on one side of the load resistor 10 to dissipate heat for the load resistor 10 .

[0094] When the load voltage and welding current are detected, the loop between the load branch 1 and the DC welding machine 5 to be detected is connected, so that the load resistor 10 on the load branch 1 is energized, and the load resistor 10 generates heat. In order to prevent the heat generated by the load resistor 10 from affecting the detection process and the safety of the device, the fan 91 can be turned on while the load voltage and welding current are detected, so that the fan 91 is used to dissipate heat to protect the device.

[0095] like Figure 2 and Figure 3 As shown, a fan switch 64 may also be installed on the side wall of the box body 6, and the fan switch 64 is used to control the opening and closing of the fan 91.

[0096] To further prevent the heat generated by the load resistor 10 from affecting the detection process and device safety, as Figure 2 and Figure 3 As shown, an over-temperature alarm light 65 may be installed on the side wall of the box 6, and a temperature probe may be provided at one end of the over-temperature alarm light 65 and extend into the box 6, and a light assembly may be provided at the other end and extend out of the box 6. The temperature probe may detect the temperature at the load resistor 10, and when the temperature value measured by the temperature probe exceeds the maximum temperature value preset on the over-temperature alarm light 65, the light assembly lights up to serve as a warning.

[0097] like Fig. 9 As shown, the detection and calibration device for a DC welding machine provided in this embodiment further includes a mobile power supply 92 , and the mobile power supply 92 is used to connect to the recorder 90 to supply power to the recorder 90 .

[0098] In addition, the mobile power source 92 can also supply power to the voltage detection component 2 and the current detection component 11 to ensure that the voltage detection component 2 and the current detection component 11 can normally detect the voltage value and the current value when they are connected to the circuit.

[0099] When the detection and calibration device for a DC welding machine also includes a fan 91 and an over-temperature warning light 65 , the mobile power supply 92 can also supply power to the fan 91 and the over-temperature warning light 65 .

[0100] To facilitate the installation and removal of the mobile power supply 92 to charge the mobile power supply 92, as shown in FIG. Figure 2 and Figure 3 As shown, in this embodiment, the box body 6 is preferably further provided with a power interface 66, and the recorder 90, the fan 91 and the over-temperature alarm light 65 are respectively electrically connected to the power interface 66, and the mobile power supply 92 is provided with a plug corresponding to the power interface 66. When the plug of the mobile power supply 92 is plugged into the power interface 66, the mobile power supply 92 can supply power to the recorder 90, the fan 91 and the over-temperature alarm light 65 through the power interface 66.

[0101] Further, such as Figure 2 As shown, a power switch 67 may also be provided on the side wall of the box body 6. The power switch 67 is used to connect to the mobile power supply 92 through the power interface 66 to control the mobile power supply 92 to supply power or stop supplying power.

[0102] In summary, the detection and calibration device for a DC welding machine provided in this embodiment can integrate the load resistor 10, the voltage detection component 2, the current detection component 11 and the load access switch 12 into one, which is not only easy to carry, but also does not need to be wired in sequence during the on-site detection process, which effectively improves the convenience of the device. In addition, the detection and calibration device for a DC welding machine can use the gear position of the conversion switch component 8 to realize the one-key conversion detection function of the no-load voltage and the load voltage, avoiding rewiring, and can use the wireless remote control switch 121 to remotely control the on and off of the load access switch 12, further improving the convenience of operation of the detection and calibration device for a DC welding machine.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection and calibration device for a DC welding machine, characterized in that: It comprises a load resistor (10), a voltage detection component (2), a current detection component (11) and a load access switch (12); The load resistor (10), the current detection component (11) and the load access switch (12) are connected in series to form a load branch (1); one end of the load branch (1) is connected to a first conductive member (3), and the other end is connected to a second conductive member (4); the first conductive member (3) and the second conductive member (4) are used to be electrically connected to the positive electrode and the negative electrode of the DC welding machine (5) to be tested, respectively; the load access switch (12) is used to open and close to control the on / off of the circuit between the load branch (1) and the DC welding machine (5) to be tested; One end of the voltage detection component (2) is electrically connected to the first conductive member (3), and the other end is electrically connected to the second conductive member (4).

2. The detection and calibration device for a DC welding machine according to claim 1, characterized in that: It also includes a no-load voltage test module (70) and a transfer switch assembly (8); The no-load voltage test module (70) comprises an input end and an output end, wherein the input end and the output end of the no-load voltage test module (70) are respectively electrically connected to the first conductive member (3) and the second conductive member (4) via a third conductive member (71) to form a no-load branch circuit (7) that can be connected in parallel between the positive and negative electrodes of the DC welding machine (5) to be tested; The no-load branch (7) is connected to the conversion switch assembly (8), and the conversion switch assembly (8) is used to disconnect the circuit between the no-load branch (7) and the DC welding machine (5) to be tested when the load access switch (12) is closed, and to connect the circuit between the no-load branch (7) and the DC welding machine (5) to be tested when the load access switch (12) is opened.

3. The detection and calibration device for a DC welding machine according to claim 2, characterized in that: The voltage detection component (2) and the no-load voltage test module (70) both comprise an input end and an output end; The input end and the output end of the voltage detection component (2) are electrically connected to the first conductive member (3) and the second conductive member (4) respectively through a fourth conductive member (20) to form a load voltage detection branch (200) that can be connected in parallel between the positive and negative electrodes of the DC welding machine (5) to be tested; The input end and the output end of the voltage detection component (2) are also electrically connected to the output end and the input end of the no-load voltage test module (70) respectively through a fifth conductive member (21), so as to form a no-load voltage detection branch (210) connected in parallel between the input end and the output end of the no-load voltage test module (70); The load voltage detection branch (200) and the no-load voltage detection branch (210) are both connected to the conversion switch assembly (8), and the conversion switch assembly (8) is used to connect the circuit between the load voltage detection branch (200) and the DC welding machine (5) to be tested, and disconnect the circuit between the no-load voltage detection branch (210) and the no-load voltage test module (70) when the load access switch (12) is closed; and to disconnect the circuit between the load voltage detection branch (200) and the DC welding machine (5) to be tested, and connect the circuit between the no-load voltage detection branch (210) and the no-load voltage test module (70) when the load access switch (12) is disconnected.

4. The detection and calibration device for a DC welding machine according to claim 3, characterized in that: The conversion switch assembly (8) comprises a no-load position, a zero position and a load position; In the no-load position, the conversion switch assembly (8) switches on the circuit between the no-load branch (7) and the DC welding machine (5) to be tested, switches on the circuit between the no-load voltage detection branch (210) and the no-load voltage test module (70), and disconnects the circuit between the load voltage detection branch (200) and the DC welding machine (5) to be tested; In the zero gear position, the conversion switch assembly (8) disconnects the circuit between the no-load branch (7) and the DC welding machine (5) to be tested, disconnects the circuit between the no-load voltage detection branch (210) and the no-load voltage test module (70), and disconnects the circuit between the load voltage detection branch (200) and the DC welding machine (5) to be tested; Under the load gear, the conversion switch assembly (8) disconnects the circuit between the no-load branch (7) and the DC welding machine (5) to be tested, disconnects the circuit between the no-load voltage detection branch (210) and the no-load voltage test module (70), and connects the circuit between the load voltage detection branch (200) and the DC welding machine (5) to be tested.

5. The detection and calibration device for a DC welding machine according to any one of claims 1 to 4, characterized in that: It also includes a power supply module (120) and a power supply switch; The power supply module (120) is electrically connected to the load access switch (12), and the power supply switch is electrically connected to the power supply module (120). The power supply switch is used to control the power supply module (120) to supply power to the load access switch (12) when closed, so that the load access switch (12) is closed; and to control the power supply module (120) to stop supplying power to the load access switch (12) when disconnected, so that the load access switch (12) is disconnected; The power switch is a wireless remote control switch (121) and / or a push button switch (122).

6. The detection and calibration device for a DC welding machine according to any one of claims 1 to 4, characterized in that: The load resistor (10) is a variable resistor.

7. The detection and calibration device for a DC welding machine according to any one of claims 1 to 4, characterized in that: Also includes a recorder (90); The voltage detection component (2) and the current detection component (11) are both electrically connected to the recorder (90); the voltage detection component (2) is used to send the voltage information detected by it to the recorder (90); the current detection component (11) is used to send the current information detected by it to the recorder (90); and the recorder (90) is used to record and display the voltage information and current information received by it.

8. The detection and calibration device for a DC welding machine according to claim 7, characterized in that: It also includes a fan (91), which is installed on one side of the load resistor (10) and is used to dissipate heat from the load resistor (10).

9. The detection and calibration device for a DC welding machine according to claim 7, characterized in that: It also includes a mobile power source (92), and the mobile power source (92) is used to be connected to the recorder (90) to supply power to the recorder (90).

10. The detection and calibration device for a DC welding machine according to any one of claims 1 to 4, characterized in that: It also comprises a box (6), wherein the load resistor (10), the voltage detection component (2), the current detection component (11) and the load access switch (12) are all installed in the box (6).

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