A portable multifunctional voltage withstand tester calibration device

Abstract

The utility model discloses a kind of multifunctional voltage withstand tester verification devices convenient to carry, including shell, portable lifting mechanism, front operation panel, front panel anti-drop protective sleeve, rear operation panel, rear panel anti-drop protective sleeve, circuit component, the shell side is equipped with sliding slot, the portable lifting mechanism is installed in sliding slot, the front operation panel is fixedly installed in shell front position, the front panel anti-drop protective sleeve is fixedly installed on front operation panel, the rear operation panel is fixedly installed in shell rear position, the rear panel anti-drop protective sleeve is fixedly installed on rear operation panel, the circuit component is fixedly installed in shell interior, this verification device is carried by the setting of portable lifting mechanism to facilitate verification personnel, realize on-site verification work, greatly improve work efficiency, it can also realize the measurement of breakdown current, distortion, output capacitance etc., verification function diversification, overcome the condition of traditional verification device function singleness.

Description

Technical Field

[0001] This utility model relates to the field of withstand voltage tester calibration technology, and in particular to a portable multifunctional withstand voltage tester calibration device. Background Technology

[0002] A withstand voltage tester, also known as a high-voltage tester or insulation withstand voltage tester, is a key piece of equipment in electrical safety testing. In actual production work, the use of a withstand voltage tester ensures the safety of electrical equipment by applying a high voltage higher than the rated voltage (such as AC / DC withstand voltage testing) to verify whether the insulation material of the equipment can withstand abnormal voltage without breakdown, thus avoiding the risk of leakage or short circuit. On the other hand, it can prevent electric shock accidents by promptly detecting insulation defects (such as cracks, aging, and contamination), preventing users from being electrocuted due to insulation failure during use. While withstand voltage testers are very important in practice and are an essential component of safe and efficient production, long-term use or environmental factors such as temperature, humidity, and electromagnetic interference can cause the output voltage or leakage current measurement values ​​of the tester to drift, leading to deviations in the test results. Therefore, it is necessary to regularly calibrate the withstand voltage tester to ensure the accuracy of its measurement results.

[0003] Currently, the calibration of withstand voltage testers is mainly carried out by professional calibration institutions. This requires staff to bring the withstand voltage tester to the calibration institution for calibration, which consumes a lot of manpower and transportation costs, resulting in low work efficiency. Moreover, the calibration device only has a single calibration function. Different calibration instruments are required for different calibration items. The calibration device has a single function and cannot efficiently complete the relevant calibration work. Utility Model Content

[0004] To overcome the above problems, the purpose of this utility model is to provide a portable multi-functional withstand voltage tester calibration device. This calibration device is easy for calibration personnel to carry due to the portable handle mechanism, enabling on-site calibration work and greatly improving the efficiency of the calibration work. At the same time, in addition to calibrating withstand voltage testers, this calibration device can also measure breakdown current, distortion, output capacitance, etc., making the calibration function diversified and overcoming the single calibration function of traditional calibration devices, thus completing the calibration work more efficiently.

[0005] The technical solution adopted in this utility model is:

[0006] A portable multi-functional withstand voltage tester calibration device includes a housing, a portable handle mechanism, a front operation panel, a front panel anti-drop protective cover, a rear operation panel, a rear panel anti-drop protective cover, and circuit components. The housing has sliding grooves on both sides, and the portable handle mechanism is installed in the sliding grooves. The front operation panel is fixedly installed at the front of the housing, and the front panel anti-drop protective cover is fixedly installed on the front operation panel. The rear operation panel is fixedly installed at the rear of the housing, and the rear panel anti-drop protective cover is fixedly installed on the rear operation panel. The circuit components are fixedly installed inside the housing.

[0007] Limiting holes are evenly provided on the upper and lower surfaces of the sliding grooves on both sides of the housing.

[0008] The portable handle mechanism includes a left adjustment mechanism, a right adjustment mechanism, a left connecting rod, a handle, and a right connecting rod. The left adjustment mechanism is connected to a sliding groove on the left side of the housing, and the right adjustment mechanism is connected to a sliding groove on the right side of the housing. One end of the left connecting rod is rotatably connected to the left adjustment mechanism, and the other end is fixedly connected to one end of the handle. The other end of the handle is fixedly connected to one end of the right connecting rod, and the other end of the right connecting rod is rotatably connected to the right adjustment mechanism. The left connecting rod, handle, and right connecting rod are integrally formed.

[0009] As a further description of this utility model, the front operation panel includes a display window, a function key area, a system key area, and a power switch. The display window is located on the left side of the front operation panel, the function key area is located on the right side of the display window, the system key area is located on the right side of the function key area, and the power switch is located below and to the right of the system key area.

[0010] The rear operation panel includes a power socket, a serial interface, a grounding terminal, a current input terminal, and a high-voltage input terminal. The power socket is located on the left side of the rear operation panel, the serial interface is located above and to the right of the power socket, the grounding terminal is located below and to the right of the power socket, the current input terminal is located to the right of the serial interface and the grounding terminal, and the high-voltage input terminal is located to the right of the current input terminal.

[0011] As a further description of this utility model, the left adjustment mechanism and the right adjustment mechanism have the same structure, both including a slider, a rotating disk, and a sliding adjustment mechanism. The slider is slidably connected in the sliding groove, and the rotating disk is rotatably connected to the left side of the slider, located on the outside of the housing. The rotating disk has a through hole in the middle. The right side of the slider is a closed structure, and the left side is a hollow structure. One end of the sliding adjustment mechanism is located outside the rotating disk, and the other end passes through the through hole of the rotating disk and is located in the hollow structure of the slider.

[0012] As a further description of this utility model, the sliding adjustment mechanism includes a sliding adjustment button, an upper limit post, a lower limit post, and a first telescopic spring. The left side of the sliding adjustment button is a cylindrical structure, and the right side is a trapezoidal structure. The trapezoidal structure is located inside the hollow structure of the slider. The upper and lower sides of the trapezoidal structure are provided with moving grooves. The upper limit post and the lower limit post have the same structure. The bottom surface of the upper limit post and the top surface of the lower limit post are both sloping structures adapted to the upper and lower sides of the trapezoidal structure, and are provided with protrusions. The protrusions are slidably connected in the moving grooves. One end of the first telescopic spring is fixedly connected to the right side of the trapezoidal structure, and the other end is fixedly connected to the right side inside the hollow structure of the slider.

[0013] As a further description of this utility model, the rotating disk is rotatably connected to the left side of the slider through a rotating support structure, and one end of the second telescopic spring is fixedly connected to the right side of the rotating disk, while the other end of the second telescopic spring is fixedly connected to the left side of the slider.

[0014] As a further description of this utility model, the front panel anti-drop protective cover and the rear panel anti-drop protective cover have the same structure, both being frame structures, and their dimensions are adapted to the dimensions of the front operation panel and the rear operation panel.

[0015] As a further description of this utility model, both the front panel anti-drop protective cover and the rear panel anti-drop protective cover are made of insulating silicone material.

[0016] As a further description of this utility model, the lower surface of the housing is also designed with insulating feet, and there are four insulating feet distributed at the four corners of the lower surface of the housing.

[0017] As a further description of this utility model, a heat dissipation vent is also provided on the lower surface of the housing.

[0018] As a further description of this utility model, the handle is provided with an anti-slip insulating sleeve.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a portable multi-functional withstand voltage tester calibration device, including a housing, a portable handle mechanism, a front operation panel, a front panel anti-drop protective cover, a rear operation panel, a rear panel anti-drop protective cover, and circuit components. The calibration device is easy for calibration personnel to carry due to the portable handle mechanism, and calibration personnel can quickly move the calibration device during on-site calibration, greatly improving the efficiency of the calibration work.

[0021] This utility model discloses a portable multi-functional withstand voltage tester calibration device. The calibration device measures output voltage, breakdown current, distortion, ripple coefficient, output current, etc., through the wiring terminals on the front and rear operation panels and the circuit components installed inside the housing. The calibration function is diversified, overcoming the single calibration function of traditional calibration devices, and completing the calibration work more efficiently.

[0022] This utility model discloses a portable multi-functional withstand voltage tester calibration device. The portable handle mechanism includes a left adjustment mechanism, a right adjustment mechanism, a left connecting rod, a handle, and a right connecting rod. The left and right adjustment mechanisms slide within sliding grooves on both sides of the housing to adjust the front and rear position of the portable handle mechanism within the housing. The left connecting rod, handle, and right connecting rod are integrally formed. The angle of the portable handle mechanism is adjusted by the setting of the rotating disk and the slider to a position that facilitates observation of the display window. This allows the calibration personnel to intuitively observe the parameters and operate the buttons on the front control panel during calibration, improving calibration efficiency.

[0023] This utility model discloses a portable multi-functional withstand voltage tester calibration device. The left and right adjustment mechanisms have the same structure, both including a slider, a rotating disk, and a sliding adjustment mechanism. The sliding adjustment mechanism includes a sliding adjustment button, an upper limit post, a lower limit post, and a first telescopic spring. During adjustment, pushing the sliding adjustment button inward compresses the first telescopic spring. At this time, the upper and lower limit posts slide within the moving groove of the slider's ladder structure. The upper and lower limit posts move downward, releasing their lock in the limiting hole. The slider then moves back and forth within the sliding groove. After moving to the appropriate position, the inward pushing force applied to the sliding adjustment button is removed. Under the action of the first telescopic spring, the upper and lower limit posts move upward and are re-fixed within the limiting hole, achieving the adjustment of the back and forth position. The rotating disk is rotatably connected to the left side of the slider through a rotating support structure, achieving the adjustment of the angle position. The overall operation is simple and convenient to use. Attached Figure Description

[0024] Figure 1 A frontal three-dimensional structural diagram of a portable multi-functional withstand voltage tester calibration device proposed in this utility model;

[0025] Figure 2 A three-dimensional structural diagram of the back of a portable multi-functional withstand voltage tester calibration device proposed in this utility model;

[0026] Figure 3 A schematic diagram of the limiting hole and left adjustment mechanism of a portable multi-functional withstand voltage tester calibration device proposed in this utility model;

[0027] Figure 4This is a schematic diagram of the internal structure of the left adjustment mechanism of a portable multi-functional withstand voltage tester calibration device proposed in this utility model.

[0028] Figure 5 A schematic diagram of the sliding adjustment button structure of a portable multi-functional withstand voltage tester calibration device proposed in this utility model;

[0029] Figure 6 A schematic diagram of the upper limit column structure of a portable multi-functional withstand voltage tester calibration device proposed in this utility model;

[0030] Figure 7 This invention presents a schematic diagram of the measurement wiring for a portable, multi-functional withstand voltage tester calibration device.

[0031] Explanation of reference numerals in the attached figures

[0032] 1-Housing shell, 11-Sliding groove, 12-Limiting hole,

[0033] 2-Portable handle mechanism, 21-Left adjustment mechanism, 211-Slider, 212-Rotating disk, 213-Sliding adjustment mechanism, 2131-Sliding adjustment button, 2132-Upper limit post, 2133-Lower limit post, 2134-First telescopic spring, 2135-Moving groove, 2136-Protrusion.

[0034] 22-Right adjusting mechanism, 23-Left connecting rod, 24-Handle, 25-Right connecting rod

[0035] 3-Front control panel, 31-Display window, 32-Function key area, 33-System key area, 34-Power switch

[0036] 4-Front panel shockproof cover,

[0037] 5- Rear control panel, 51- Power socket, 52- Serial interface, 53- Grounding terminal, 54- Current input terminal, 55- High voltage input terminal.

[0038] 6- Rear panel anti-drop protective cover. Detailed Implementation

[0039] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0040] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0041] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0042] like Figures 1-7 As shown, it illustrates a specific embodiment of this utility model:

[0043] Example 1

[0044] A portable multi-functional withstand voltage tester calibration device includes a housing 1, a portable handle mechanism 2, a front operation panel 3, a front panel anti-drop protective cover 4, a rear operation panel 5, a rear panel anti-drop protective cover 6, and a circuit assembly. The housing 1 has sliding grooves 11 on both sides, and the portable handle mechanism 2 is installed in the sliding grooves 11. The front operation panel 3 is fixedly installed at the front of the housing 1, and the front panel anti-drop protective cover 4 is fixedly installed on the front operation panel 3. The rear operation panel 5 is fixedly installed at the rear of the housing 1, and the rear panel anti-drop protective cover 6 is fixedly installed on the rear operation panel 5. The circuit assembly is fixedly installed inside the housing 1.

[0045] In this embodiment, as Figure 1 , Figure 2 As shown, the calibration device is easy for calibration personnel to carry due to the portable handle mechanism 2. Calibrators can quickly move the calibration device during on-site calibration, which greatly improves the efficiency of the calibration work. The output voltage, breakdown current, distortion, ripple coefficient, output current, etc. are measured through the wiring terminals on the front operation panel 3 and the rear operation panel 5 and the circuit components installed inside the housing 1. The calibration function is diversified, overcoming the single calibration function of traditional calibration devices, and completing the calibration work more efficiently.

[0046] Limiting holes 12 are evenly provided on the upper and lower surfaces of the sliding grooves 11 on both sides of the housing 1;

[0047] The portable handle mechanism 2 includes a left adjustment mechanism 21, a right adjustment mechanism 22, a left connecting rod 23, a handle 24, and a right connecting rod 25. The left adjustment mechanism 21 is connected to the left sliding groove 11 of the housing 1, and the right adjustment mechanism 22 is connected to the right sliding groove 11 of the housing 1. One end of the left connecting rod 23 is rotatably connected to the left adjustment mechanism 21, and the other end is fixedly connected to one end of the handle 24. The other end of the handle 24 is fixedly connected to one end of the right connecting rod 25, and the other end of the right connecting rod 25 is rotatably connected to the right adjustment mechanism 22. The left connecting rod 23, the handle 24, and the right connecting rod 25 are integrally formed.

[0048] In this embodiment, as Figure 1 , Figure 2 As shown, the portable handle mechanism 2 slides within the sliding grooves 11 on both sides of the housing 1 via the left adjustment mechanism 21 and the right adjustment mechanism 22, adjusting the front and rear positions of the portable handle mechanism 2 within the housing 1. The left connecting rod 23, handle 24, and right connecting rod 25 are integrally formed. The angle of the portable handle mechanism 2 is adjusted by the setting of the rotating disk 212 and the slider 211, adjusting it to an angle that facilitates observation of the display window 31. In this way, during verification, the verification personnel can intuitively observe the parameters and operate the buttons on the front operation panel, improving verification efficiency.

[0049] Example 2

[0050] Specifically, the front operation panel 3 includes a display window 31, a function key area 32, a system key area 33, and a power switch 34. The display window 31 is located on the left side of the front operation panel 3, the function key area 32 is located on the right side of the display window 31, the system key area 33 is located on the right side of the function key area 32, and the power switch 34 is located on the lower right side of the system key area 33.

[0051] The rear operation panel 5 includes a power socket 51, a serial interface 52, a ground terminal 53, a current input terminal 54, and a high-voltage input terminal 55. The power socket 51 is located on the left side of the rear operation panel 5. The serial interface 52 is located above and to the right of the power socket 51. The ground terminal 53 is located below and to the right of the power socket 51. The current input terminal 54 is located to the right of the serial interface 52 and the ground terminal 53. The high-voltage input terminal 55 is located to the right of the current input terminal 54.

[0052] In this embodiment, the schematic diagrams illustrating the voltage measurement, current measurement, and capacity measurement using the calibration device are shown below. Figure 7 The specific measurement process is explained below:

[0053] Wiring for measuring the output voltage of the withstand voltage tester: Connect the high-end lead of the withstand voltage tester to the high-voltage input terminal 55 of the operation panel 5 on the back of the calibration device. Connect the low-end lead of the withstand voltage tester (i.e., the return terminal) to the grounding terminal 53 of the operation panel 5 on the back of the calibration device. Correctly select the AC / DC voltage option.

[0054] Wiring for measuring the breakdown current of the withstand voltage tester: First, connect the high-end lead of the withstand voltage tester's output voltage to the corresponding current test point on the load bank. Next, connect the black common low terminal of the load bank to the corresponding fine-tuning potentiometer. Then, connect the end of the fine-tuning potentiometer to the red current input terminal 54 on the rear operation panel 5 of the calibration device. The calibration device has two current input terminals, red and black. Return the lead from the black current input terminal 54 on the rear operation panel 5 of the calibration device to the low-end output of the withstand voltage tester. Slowly increase the output voltage of the withstand voltage tester. When it approaches the preset alarm current value of the withstand voltage tester, slowly adjust the fine-tuning potentiometer from large to small until the withstand voltage tester alarms. Record the peak holding current at this point, which is the breakdown alarm current of the withstand voltage tester.

[0055] Distortion, ripple coefficient, and residence time are measured simultaneously with the voltage measurement, except that the timing threshold voltage of the calibrator is lower than the set voltage of the withstand voltage tester.

[0056] Output capacity measurement: In the orange capacity measurement section of the load cell, select the measurement point. Connect the high-side lead of the withstand voltage tester to the measurement point. Connect the black common low-side lead of the load cell capacity section to the red current input terminal 54 on the rear operation panel 5 of the calibration device. Return the lead from the black current input terminal 54 on the rear operation panel 5 of the calibration device to the low-side output of the withstand voltage tester. The voltage measurement wiring is the same as above. Slowly increase the output voltage of the withstand voltage tester to the rated voltage. The capacity will be displayed in real-time in the display window 31 of the front operation panel 3. Record the relevant data.

[0057] Example 3

[0058] Specifically, the left adjustment mechanism 21 and the right adjustment mechanism 22 have the same structure, both including a slider 211, a rotating disk 212, and a sliding adjustment mechanism 213. The slider 211 is slidably connected in the sliding groove 11, and the rotating disk 212 is rotatably connected to the left side of the slider 211, located outside the housing 1. The rotating disk 212 has a through hole in the middle. The right side of the slider 211 is a closed structure, and the left side is a hollow structure. One end of the sliding adjustment mechanism 213 is located outside the rotating disk 212, and the other end passes through the through hole of the rotating disk 212 and is located inside the hollow structure of the slider 211.

[0059] Specifically, the sliding adjustment mechanism 213 includes a sliding adjustment button 2131, an upper limit post 2132, a lower limit post 2133, and a first telescopic spring 2134. The sliding adjustment button 2131 has a cylindrical structure on the left and a stepped structure on the right. The stepped structure is located inside the hollow structure of the slider 211. The upper and lower sides of the stepped structure are provided with moving grooves 2135. The upper limit post 2132 and the lower limit post 2133 have the same structure. The bottom surface of the upper limit post 2132 and the top surface of the lower limit post 2133 are both sloped structures that are adapted to the upper and lower sides of the stepped structure, and are provided with protrusions 2136. The protrusions 2136 are slidably connected in the moving grooves 2135. One end of the first telescopic spring 2134 is fixedly connected to the right side of the stepped structure, and the other end is fixedly connected to the right side inside the hollow structure of the slider 211.

[0060] Specifically, the rotating disk 212 and the slider 211 are rotatably connected on the left side through a rotating support structure.

[0061] In this embodiment, as Figure 3-6 As shown, during adjustment, the sliding adjustment button 2131 is pushed inward, compressing the first telescopic spring 2134. At this time, the upper limit post 2132 and the lower limit post 2133 slide within the moving groove 2135 of the slider ladder structure. The upper limit post 2132 and the lower limit post 2133 move downward, releasing their lock in the limiting hole 12. At this time, the moving slider 211 moves back and forth within the sliding groove 11. After moving to the appropriate position, the inward pushing force applied to the sliding adjustment button 2131 is removed. Under the action of the elastic force of the first telescopic spring 2134, the upper limit post 2132 and the lower limit post 2133 move upward and are re-fixed within the limiting hole 12, realizing the adjustment of the back and forth position. The rotating disk 212 is rotatably connected to the left side of the slider 211 through a rotating support structure, realizing the adjustment of the angle position. The overall operation is simple and convenient to use.

[0062] Example 4

[0063] Specifically, the front panel anti-drop protective cover 4 and the rear panel anti-drop protective cover 6 have the same structure, both being frame structures, and their dimensions are adapted to the dimensions of the front operation panel 3 and the rear operation panel 5.

[0064] Specifically, both the front panel anti-drop protective cover 4 and the rear panel anti-drop protective cover 6 are made of insulating silicone material.

[0065] In this embodiment, a front panel anti-drop protective cover 4 and a rear panel anti-drop protective cover 6 made of silicone material are used to prevent the calibration device from being bumped or vibrated, which could cause deviations in accuracy.

[0066] Specifically, the lower surface of the housing 1 is also designed with insulating feet, and there are four insulating feet distributed at the four corners of the lower surface of the housing 1.

[0067] Specifically, a heat dissipation vent is also provided on the lower surface of the housing 1.

[0068] In this embodiment, the foot pads create a certain distance between the housing 1 and the calibration platform, which helps the heat generated by the calibration device during operation to be dissipated through the heat dissipation vents on the lower surface of the housing 1, ensuring that the calibration device works effectively.

[0069] Specifically, the handle 24 is provided with an anti-slip insulating sleeve.

[0070] In this embodiment, the anti-slip insulating sleeve helps the person carrying the device to lift it more easily, increases the friction between the hand and the handle 24, and prevents it from slipping.

[0071] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0072] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A portable, multi-functional withstand voltage tester calibration device, characterized in that, The device includes a housing (1), a portable handle mechanism (2), a front operating panel (3), a front panel anti-drop protective cover (4), a rear operating panel (5), a rear panel anti-drop protective cover (6), and a circuit assembly. The housing (1) has sliding grooves (11) on both sides. The portable handle mechanism (2) is installed in the sliding grooves (11). The front operating panel (3) is fixedly installed at the front of the housing (1). The front panel anti-drop protective cover (4) is fixedly installed on the front operating panel (3). The rear operating panel (5) is fixedly installed at the rear of the housing (1). The rear panel anti-drop protective cover (6) is fixedly installed on the rear operating panel (5). The circuit assembly is fixedly installed inside the housing (1). Limiting holes (12) are evenly opened on the upper and lower surfaces of the sliding grooves (11) on both sides of the housing (1). The portable handle mechanism (2) includes a left adjustment mechanism (21), a right adjustment mechanism (22), a left connecting rod (23), a handle (24), and a right connecting rod (25). The left adjustment mechanism (21) is connected to the left sliding groove (11) of the housing (1), and the right adjustment mechanism (22) is connected to the right sliding groove (11) of the housing (1). One end of the left connecting rod (23) is rotatably connected to the left adjustment mechanism (21), and the other end is fixedly connected to one end of the handle (24). The other end of the handle (24) is fixedly connected to one end of the right connecting rod (25), and the other end of the right connecting rod (25) is rotatably connected to the right adjustment mechanism (22). The left connecting rod (23), the handle (24), and the right connecting rod (25) are integrally formed.

2. The portable multi-functional withstand voltage tester calibration device according to claim 1, characterized in that, The front operation panel (3) includes a display window (31), a function key area (32), a system key area (33), and a power switch (34). The display window (31) is located on the left side of the front operation panel (3), the function key area (32) is located on the right side of the display window (31), the system key area (33) is located on the right side of the function key area (32), and the power switch (34) is located below the right side of the system key area (33). The rear operation panel (5) includes a power socket (51), a serial interface (52), a ground terminal (53), a current input terminal (54), and a high voltage input terminal (55). The power socket (51) is located on the left side of the rear operation panel (5). The serial interface (52) is located above the right side of the power socket (51). The ground terminal (53) is located below the right side of the power socket (51). The current input terminal (54) is located to the right of the serial interface (52) and the ground terminal (53). The high voltage input terminal (55) is located to the right of the current input terminal (54).

3. The portable multi-functional withstand voltage tester calibration device according to claim 1, characterized in that, The left adjustment mechanism (21) and the right adjustment mechanism (22) have the same structure, both including a slider (211), a rotating disk (212), and a sliding adjustment mechanism (213). The slider (211) is slidably connected in the sliding groove (11). The rotating disk (212) is rotatably connected to the left side of the slider (211) and located outside the housing (1). The rotating disk (212) has a through hole in the middle. The right side of the slider (211) is a closed structure and the left side is a hollow structure. One end of the sliding adjustment mechanism (213) is located outside the rotating disk (212), and the other end passes through the through hole of the rotating disk (212) and is located inside the hollow structure of the slider (211).

4. The portable multi-functional withstand voltage tester calibration device according to claim 3, characterized in that, The sliding adjustment mechanism (213) includes a sliding adjustment button (2131), an upper limit post (2132), a lower limit post (2133), and a first telescopic spring (2134). The sliding adjustment button (2131) has a cylindrical structure on the left and a stepped structure on the right. The stepped structure is located inside the hollow structure of the slider (211). The upper and lower sides of the stepped structure are provided with moving grooves (2135). The upper limit post (2132) and the lower limit post (2133) have the same structure. The bottom surface of the upper limit post (2132) and the top surface of the lower limit post (2133) are both slope structures that are adapted to the upper and lower sides of the stepped structure, and are provided with protrusions (2136). The protrusions (2136) are slidably connected in the moving grooves (2135). One end of the first telescopic spring (2134) is fixedly connected to the right side of the stepped structure, and the other end is fixedly connected to the right side inside the hollow structure of the slider (211).

5. The portable multi-functional withstand voltage tester calibration device according to claim 3, characterized in that, The rotating disk (212) and the slider (211) are rotatably connected on the left side through a rotating support structure.

6. The portable multi-functional withstand voltage tester calibration device according to claim 1, characterized in that, The front panel anti-drop protective cover (4) and the rear panel anti-drop protective cover (6) have the same structure, both being frame structures, and their dimensions are adapted to the dimensions of the front operation panel (3) and the rear operation panel (5).

7. The portable multi-functional withstand voltage tester calibration device according to claim 6, characterized in that, Both the front panel anti-drop protective cover (4) and the rear panel anti-drop protective cover (6) are made of insulating silicone material.

8. The portable multi-functional withstand voltage tester calibration device according to claim 1, characterized in that, The lower surface of the housing (1) is also designed with insulating foot pads. There are four insulating foot pads, which are distributed at the four corners of the lower surface of the housing (1).

9. The portable multi-functional withstand voltage tester calibration device according to claim 1, characterized in that, The lower surface of the housing (1) is also provided with a heat dissipation port.

10. A portable multi-functional withstand voltage tester calibration device according to claim 1, characterized in that, The handle (24) is provided with an anti-slip insulating sleeve.

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