No-load voltage calibration device

Abstract

The invention provides a no-load voltage calibration device, and relates to the technical field of voltage calibration, the no-load voltage calibration device comprises a calibration device main body, the calibration device main body is provided with an input end used for connecting a welding power supply and an output end used for connecting a multimeter; a plurality of adjustable resistor assemblies are arranged in the calibration device main body, and the plurality of adjustable resistor assemblies are connected in series; a plurality of control knobs are arranged on the calibration device main body, and each control knob is connected with one adjustable resistor assembly. The input end of the no-load voltage calibration device is used for being connected with a welding power source, and the output end of the no-load voltage calibration device is used for being connected with a multimeter. The multiple adjustable resistor assemblies are arranged on the calibration device body, and when the resistance value of the resistor needs to be changed, the resistance value of the adjustable resistor can be adjusted more accurately through matched adjustment of the multiple adjustable resistor assemblies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of voltage calibration, and in particular to a no-load voltage calibration device. BACKGROUND

[0002] In nuclear power construction, electric welding machines, as important welding measuring instruments, are widely used in various metal material processing in manufacturing industry. The no-load voltage and working current values of the welding machine power supply are directly related to the welding quality. Only by regularly calibrating the no-load voltage and working current output by the electric welding machine can the welding construction quality on site be guaranteed.

[0003] Under the grand strategy of "Quality Power", the control requirements for welding quality in various industries are gradually improving. The State Administration for Market Regulation has issued the calibration specification for electric welding machines (JJF 1985-2022 "Calibration Specification for DC Welding Machine Welding Power Supply"). The measurement management room of Xiapu project department uses the traditional electric welding machine calibration method of traditional electric welding machine, which uses digital clamp meters and digital multimeters to compare the welding machine voltage and working current online, which does not meet the national calibration specification. As the main equipment and facility for welding quality control, the welding machine faces the demand of welding construction on site, and it is urgent to establish a new welding machine calibration standard device. SUMMARY

[0004] The purpose of the present application is to provide a no-load voltage calibration device and a welding power supply calibration device to solve the technical problem that the traditional electric welding machine calibration method cannot meet the demand.

[0005] The present application provides a no-load voltage calibration device, which comprises a calibration device main body, the calibration device main body has an input end for connecting a welding power supply and an output end for connecting a multimeter; A plurality of adjustable resistance components are arranged in the calibration device main body, and the plurality of adjustable resistance components are connected in series. A plurality of control knobs are arranged on the calibration device main body, and each control knob is connected with an adjustable resistance component.

[0006] In an optional embodiment, a first resistor is connected in series with the adjustable resistance components. In an optional embodiment, the plurality of adjustable resistance components comprises at least one first adjustable resistance component and at least one second adjustable resistance component, and the adjustable range of the first adjustable resistance component is greater than that of the second adjustable resistance component.

[0007] In an optional embodiment, four first adjustable resistance components and two second adjustable resistance components are included; and the four first adjustable resistance components are connected in series and then connected in series with the two second adjustable resistance components connected in series.

[0008] In an optional embodiment, a third branch is arranged between the first branch and the second branch, one end of the third branch is connected with the first branch, and the other end is connected with the second branch. The first resistance and the adjustable resistance assembly are connected in series on the third branch.

[0009] In an optional embodiment, a second resistance and a diode are arranged on the first branch. In an optional embodiment, a fourth branch and a fifth branch are further arranged between the first branch and the second branch. The diode is located between the connection between the fourth branch and the first branch and the connection between the fifth branch and the first branch.

[0010] In an optional embodiment, a first capacitor is arranged on the fourth branch, and a second capacitor is arranged on the fifth branch. In an optional embodiment, a universal wheel is arranged at the lower end of the calibration device body.

[0011] The input end of the no-load voltage calibration device is used to be connected with a welding power source, and the output end is used to be connected with a multimeter; a plurality of adjustable resistance assemblies are arranged on the calibration device body, when it is necessary to change the resistance value, the resistance value of the adjustable resistance can be adjusted more accurately through the cooperation of the plurality of adjustable resistance assemblies. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0013] Figure 1 The structure schematic diagram of the no-load voltage calibration device provided by the embodiments of the present application is shown in the figure. Figure 2 The circuit principle diagram of the no-load voltage calibration device is shown in the figure. Figure 1 The circuit principle diagram of the no-load voltage calibration device is shown in the figure.

[0014] Figure legend: 100-calibration device body; 200-control knob; 300-adjustable resistance assembly; 400-first resistance; 500-first branch; 600-second branch; 700-third branch; 800-fourth branch; 900-fifth branch; 110-second resistance; 120-diode; 130-first capacitor; 140-second capacitor. DETAILED DESCRIPTION

[0015] The terms "first", "second", "third", and the like, are used only to distinguish descriptions, and do not indicate the arrangement number, and cannot be understood as indicating or implying relative importance.

[0016] In addition, the terms "horizontal", "vertical", "overhanging", and the like, do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0017] In the description of the present application, it should be pointed out that the terms "in", "out", "left", "right", "up", "down" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0018] In the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements.

[0019] The technical solutions of the present application will be described below in conjunction with the drawings.

[0020] Embodiments Referring to Figure 1 and Figure 2 The present application provides a no-load voltage calibration device, comprising a calibration device main body 100, the calibration device main body 100 has an input end for connecting a welding power supply and an output end for connecting a multimeter; A plurality of adjustable resistance components 300 are arranged in the calibration device main body 100, and the plurality of adjustable resistance components 300 are connected in series; A plurality of control knobs 200 are arranged on the calibration device main body 100, each control knob 200 is connected with an adjustable resistance component 300.

[0021] In some embodiments, the calibration device main body 100 of the no-load voltage calibration device is connected with the input end of the welding power supply and the output end of the multimeter respectively, a plurality of adjustable resistance components 300 are arranged in the calibration device main body 100, the plurality of adjustable resistance components 300 are connected in series, and the resistance value of each adjustable resistance component 300 is adjustable; Multiple control knobs 200 are provided on the main body 100 of the calibration device. Each control knob 200 corresponds to an adjustable resistor component 300. The operator adjusts the resistance value of the corresponding adjustable resistor component 300 by using the control knob 200. Multiple adjustable resistor components 300 work together to adjust the resistance value, so that the adjustable range of each adjustable resistor component 300 is reduced, thereby improving the accuracy of adjusting the resistance value.

[0022] In an optional embodiment, a first resistor 400 is also included, which is connected in series with the adjustable resistor assembly 300. In some embodiments, the first resistor 400 is connected in series with multiple adjustable resistor components 300. When all adjustable resistor components 300 are adjusted to their minimum values, the first resistor 400 can ensure that it has a certain resistance value to avoid the resistance value being too small. The first resistor 400 can play a current limiting role to prevent excessive current from occurring when the adjustable resistor component 300 is adjusted to too small, thereby protecting the power supply, the adjustable resistor component 300 and other sensitive components in the circuit, and preventing damage to the components due to overcurrent.

[0023] In an optional embodiment, the plurality of adjustable resistor components 300 include at least one first adjustable resistor component and at least one second adjustable resistor component, wherein the adjustable range of the first adjustable resistor component is greater than the adjustable range of the second adjustable resistor component.

[0024] The plurality of adjustable resistor components 300 include at least one first adjustable resistor component and at least one second adjustable resistor component; the adjustment accuracy of the first adjustable resistor component and the second adjustable resistor component are different; generally, the adjustment accuracy of the first adjustable resistor component is less than that of the second adjustable resistor component; that is, the resistance value is coarsely adjusted by the first adjustable resistor component and then finely adjusted by the second adjustable resistor component, thereby achieving rapid and accurate adjustment of the resistance value.

[0025] In an optional implementation, it includes four first adjustable resistor components and two second adjustable resistor components; and the four first adjustable resistor components are connected in series in sequence and then connected in series with the two second adjustable resistor components connected in series.

[0026] In some embodiments, the calibration device body 100 has four first adjustable resistor components and two second adjustable resistor components. Generally, the four first adjustable resistor components are connected in series, and then the two second adjustable resistor components are connected in series.

[0027] The first control knob is used to connect to the first adjustable resistor assembly, and the second control knob is used to connect to the second adjustable resistor assembly; four knobs are arranged in two rows and two columns on the main body 100 of the calibration device; two second control knobs are arranged below the first control knob.

[0028] In an optional embodiment, a third branch 700 is arranged between the first branch 500 and the second branch 600, one end of the third branch 700 is connected with the first branch 500, and the other end is connected with the second branch 600. The first resistor 400 and the adjustable resistance component 300 are connected in series on the third branch 700.

[0029] In an optional embodiment, a second resistor 110 and a diode 120 are arranged on the first branch 500. In an optional embodiment, a fourth branch 800 and a fifth branch 900 are further arranged between the first branch 500 and the second branch 600. The diode 120 is located between the connection of the fourth branch 800 and the first branch 500 and the connection of the fifth branch 900 and the first branch 500.

[0030] In an optional embodiment, a first capacitor 130 is arranged on the fourth branch 800, and a second capacitor 140 is arranged on the fifth branch 900.

[0031] The first capacitor 130 is a 10nF capacitor, the second capacitor 140 is a 6.8nF capacitor, and the second resistor 110 is generally 1kΩ. The adjustable resistance component 300 is used to adjust the input voltage, and by changing its resistance value, the voltage division condition is changed, thereby affecting the input signal size of the subsequent circuit. The second resistor 110 may play a role of current limiting and voltage division in the circuit, preventing damage to components caused by excessive current.

[0032] The diode 120 has unidirectional conductivity, and is used for rectification in the no-load voltage calibration, converting alternating current into direct current, so as to facilitate subsequent measurement, calibration and other operations. The first capacitor 130 and the second capacitor 140 are used for filtering to remove high-frequency noise in the signal, so that the output signal is more stable, and the no-load voltage of the electric welding machine can be accurately calibrated.

[0033] In an optional embodiment, universal wheels are arranged at the lower end of the calibration device body 100.

[0034] In order to facilitate the movement of the calibration device body 100, universal wheels are arranged at the lower end of the calibration device body 100. Generally, four universal wheels are arranged at the lower end of the calibration device body 100.

[0035] The input end of the empty load voltage calibration device is used for being connected with a welding power supply, and the output end is used for being connected with a multimeter; a plurality of adjustable resistance components 300 are arranged on the main body 100 of the calibration device, when it is needed to change the resistance value, the resistance value of the adjustable resistance can be more accurately adjusted through the cooperation of the plurality of adjustable resistance components 300.

[0036] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A no-load voltage calibration apparatus characterized by comprising: The calibration device comprises a calibration device body (100) having an input end for connecting a welding power source and an output end for connecting a multimeter; A plurality of adjustable resistance assemblies (300) are arranged in the calibration device body (100), and the plurality of adjustable resistance assemblies (300) are connected in series. A plurality of control knobs (200) are arranged on the calibration device body (100), and each control knob (200) is connected with one adjustable resistance assembly (300).

2. The no-load voltage calibration apparatus according to claim 1, characterized by A first resistance (400) is further arranged in series with the adjustable resistance assemblies (300).

3. The no-load voltage calibration apparatus according to claim 2, characterized by, The plurality of adjustable resistance assemblies (300) comprise at least one first adjustable resistance assembly (300) and at least one second adjustable resistance assembly (300), and the adjustable range of the first adjustable resistance assembly (300) is greater than that of the second adjustable resistance assembly (300).

4. The no-load voltage calibration apparatus according to claim 3, characterized by The calibration device comprises four first adjustable resistance assemblies (300) and two second adjustable resistance assemblies (300), and the four first adjustable resistance assemblies (300) are connected in series and then connected in series with the two second adjustable resistance assemblies (300).

5. The no-load voltage calibration apparatus of claim 2, wherein A first branch (500) and a second branch (600) are further arranged, and a third branch (700) is arranged between the first branch (500) and the second branch (600), one end of the third branch (700) is connected with the first branch (500), and the other end is connected with the second branch (600). The first resistance (400) and the adjustable resistance assemblies (300) are connected in series on the third branch (700).

6. The no-load voltage calibration apparatus of claim 5, wherein A second resistance (110) and a diode (120) are arranged on the first branch (500).

7. The no-load voltage calibration apparatus according to claim 6, characterized by A fourth branch (800) and a fifth branch (900) are further arranged between the first branch (500) and the second branch (600). The diode (120) is arranged between the connection between the fourth branch (800) and the first branch (500) and the connection between the fifth branch (900) and the first branch (500).

8. The no-load voltage calibration apparatus of claim 7, wherein A first capacitor (130) is arranged on the fourth branch (800), and a second capacitor (140) is arranged on the fifth branch (900).

9. The no-load voltage calibration apparatus of claim 1, wherein A universal wheel is arranged at the lower end of the calibration device body (100).

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