Breakdown voltage testing device

Abstract

The invention provides a breakdown voltage testing device, and relates to the technical field of insulating oil breakdown voltage testing devices. The breakdown voltage testing device comprises a cup body used for containing an insulating medium; the cup cover is detachably connected to the top of the cup body; the electrode group is connected to the cup cover; each electrode group comprises two electrodes which are oppositely arranged; the adjusting assembly is installed on the cup cover, the adjusting assembly is connected with the electrode set, and the adjusting assembly adjusts the distance between the two electrodes which are oppositely arranged. According to the breakdown voltage testing device provided by the invention, an electrode does not need to be contacted or power-off grounding operation does not need to be carried out when the insulating medium is replaced, the electric shock risk of personnel is remarkably reduced, and the testing safety, convenience and working efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of insulating oil breakdown voltage test devices, and particularly to a breakdown voltage test device. Background Art

[0002] Breakdown voltage test is an important means of insulation supervision in the power system, used to evaluate the electrical strength of insulating media. By placing insulating oil in a test oil cup, applying a gradually increasing voltage until breakdown, recording the breakdown voltage value, it is determined whether the insulating oil meets the operating standards.

[0003] Existing test devices usually consist of an oil cup, electrodes, and a step-up transformer. The electrodes are fixed inside the oil cup (such as at the bottom or side wall). During testing, insulating oil needs to be poured into the oil cup, and the electrodes are connected to the step-up transformer through wires, and the test is carried out at the standard step-up speed.

[0004] However, when replacing the insulating oil in the existing test device, it is necessary to cut off the power supply of the oil cup, remove the electrodes and then pour out the insulating oil. In this way, there may be a risk of electric shock due to improper operation. In addition, when replacing the electrodes, the whole device needs to be disassembled. Frequent disassembly and assembly of the electrodes may also cause mechanical wear or poor contact, affecting the stability and repeatability of the test results. Moreover, after removing the electrodes, it is necessary to reinstall and adjust the distance between the electrodes, and the calibration process is complex and time-consuming, reducing the test efficiency. Summary of the Invention

[0005] In view of the above problems, the embodiments of the present application provide a breakdown voltage test device, which does not require contacting the electrodes or performing power-off and grounding operations when replacing the insulating medium, significantly reducing the risk of electric shock to personnel and improving the safety, convenience, and working efficiency of the test.

[0006] To achieve the above object, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides a breakdown voltage test device, including: a cup body for containing an insulating medium; a cup cover detachably connected to the top of the cup body; at least one electrode group connected to the cup cover; each electrode group includes two relatively arranged electrodes; an adjusting component installed on the cup cover and connected to the electrode group, and the adjusting component adjusts the distance between the two relatively arranged electrodes.

[0008] In a possible implementation manner, the electrode group includes at least two, and the shapes of the ends of the electrodes in different electrode groups are different.

[0009] In a possible implementation manner, the electrode includes a common electrode, the common electrode is shared by two adjacent electrode groups, and the common electrode includes at least one pair of ends arranged back to back, and the shapes of the two ends arranged back to back are different.

[0010] In a possible implementation, each electrode group includes a fixed electrode and an adjustable electrode. The position of the fixed electrode is fixed, and the adjustment component is connected to the adjustable electrode.

[0011] In a possible implementation, the adjustment component includes: an adjustment knob rotatably provided on the cup lid; a transmission component connected between the adjustment knob and the electrode group. The adjustment knob drives the transmission component to move, and the transmission component drives the electrode group to move to adjust the distance between the two electrodes.

[0012] In a possible implementation, the transmission component includes: a driving gear connected to the adjustment knob; a driven rack meshing with the driving gear and connected to the electrode group.

[0013] In a possible implementation, a scale is provided on the surface of the cup lid, and the scale can indicate the distance between the two relatively arranged electrodes.

[0014] In a possible implementation, the adjustment component includes: an indicating member for indicating the position of the electrode on the scale.

[0015] In a possible implementation, it further includes: an electrode terminal passing through the cup lid and connected to the electrode, and the electrode terminal is configured to be connected to a step-up transformer.

[0016] In a possible implementation, the cup body, the cup lid and the adjustment component are insulating parts.

[0017] The breakdown voltage test device provided by the present application includes a cup body, a cup lid, at least one electrode group and an adjustment component. Among them, the cup body is used to hold an insulating medium, and the cup lid is detachably connected to the top of the cup body. Each electrode group is composed of a pair of relatively arranged electrodes and is integrated on the cup lid. In this way, when it is necessary to replace the insulating medium, only need to open the cup lid and replace the insulating medium in the cup body, without contacting the electrodes during the operation process, thus greatly reducing the safety hazard. In addition, the electrodes are integrated on the cup lid, which can also avoid the problem of poor contact of the electrode contacts caused by frequent disassembly of the electrodes, ensuring the stability and accuracy of the breakdown voltage test. In addition, the adjustment component is installed on the cup lid and connected to the electrode group, which can flexibly adjust the distance between the two electrodes, further simplifying the operation process and improving the practicability and test efficiency of the test device. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a front view of the breakdown voltage test device provided by the embodiment of the present application;

[0020] Figure 2 It is a side view of the breakdown voltage test device provided by the embodiment of the present application;

[0021] Figure 3 It is a cross-sectional view of the breakdown voltage test device provided by the embodiment of the present application;

[0022] Figure 4 It is a top view of the breakdown voltage test device provided by the embodiment of the present application.

[0023] Explanation of reference numerals:

[0024] 10 - Breakdown voltage test device;

[0025] 100 - Cup body; 200 - Cup cover; 300 - Electrode group; 400 - Adjustment component; 500 - Scale; 600 - Electrode terminal;

[0026] 310 - Electrode; 320 - First electrode group; 330 - Second electrode group; 410 - Adjustment knob; 420 - Transmission component; 430 - Indicator;

[0027] 311 - Fixed electrode; 312 - Adjustable electrode; 313 - Common electrode; 314 - End; 421 - Driving gear; 422 - Driven rack. Detailed implementation manners

[0028] As described in the background art, the breakdown test of insulating media is a crucial detection means in the power system, mainly used to evaluate the electrical strength of insulating materials. In power equipment, the breakdown voltage value of the insulating medium is directly related to the safe operation of the equipment.

[0029] The breakdown voltage test simulates a high-voltage environment to detect the tolerance of the insulating medium under the action of an electric field. Once the voltage exceeds its tolerance limit, the insulating medium will break down and form a conductive channel. This test can not only reflect the aging degree of the insulating medium but also detect impurities or moisture in the insulating medium in a timely manner, thus providing a scientific basis for equipment maintenance and replacement. Therefore, regularly conducting the breakdown voltage test of the insulating medium is an important measure to ensure the stable operation of the power system.

[0030] Taking the breakdown voltage test of insulating oil as an example, currently, the breakdown voltage test mainly uses the oil cup electrode method. The test device usually includes an oil cup with electrodes integrated inside. The electrodes are connected to a step-up transformer through wires. During the test, the insulating oil to be tested is poured into the oil cup, and the voltage is gradually increased at a specified step-up rate until the insulating oil breaks down. The voltage value at this time is recorded as the breakdown voltage. This test method is relatively simple to operate and can obtain test results quickly, so it has been widely used in the power system.

[0031] However, the existing test devices have some obvious deficiencies in actual use. First, when replacing the oil sample of the insulating oil, power-off grounding operations are required. The operator must ensure that the equipment is completely powered off and grounded, otherwise electric shock accidents may occur. Second, according to different test requirements, the shape and type of the electrodes may need to be replaced. In the existing devices, the electrodes are usually fixed in the oil cup. When replacing the electrodes, the oil cup needs to be disassembled or the whole device needs to be replaced, increasing the complexity of the operation.

[0032] In view of this, the present application provides a breakdown voltage test device, including a cup body, a cup cover, at least one electrode group, and an adjustment component. Among them, the cup body is used to hold the insulating medium, and the cup cover is detachably connected to the top of the cup body. Each electrode group consists of a pair of oppositely arranged electrodes and is integrated on the cup cover. In this way, when it is necessary to replace the insulating medium, only the cup cover needs to be opened and the insulating medium in the cup body can be replaced. There is no need to contact the electrodes during the operation process, thus greatly reducing the safety hazards. In addition, the electrodes are integrated on the cup cover, which can also avoid the problem of poor contact of the electrode contacts caused by frequent disassembly of the electrodes, ensuring the stability and accuracy of the breakdown voltage test. In addition, the adjustment component is installed on the cup cover and connected to the electrode group, and the distance between the two electrodes can be flexibly adjusted, further simplifying the operation process and improving the practicability and test efficiency of the test device.

[0033] In order to make the above-mentioned objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0034] Figure 1 It is a front view of the breakdown voltage test device provided by the embodiment of the present application. Figure 2 It is a side view of the breakdown voltage test device provided by the embodiment of the present application. Refer to Figure 1 and Figure 2As shown, an embodiment of the present application provides a breakdown voltage testing device. The breakdown voltage testing device 10 can be used to measure the breakdown voltage value of insulating oil or other liquid insulating media to determine whether their insulation performance meets the operating requirements.

[0035] Exemplarily, the breakdown voltage testing device 10 can be widely applied in the fields of power systems, electrical equipment manufacturing and maintenance to detect the tolerance of insulating media under the action of an electric field. It helps to promptly discover problems such as aging, contamination or moisture intrusion of insulating media, providing an important basis for preventive maintenance and fault diagnosis of equipment. Alternatively, the breakdown voltage testing device 10 can also be used for laboratory research and new material development, providing reliable technical support for the performance evaluation and quality control of insulating materials.

[0036] Referring to Figure 1 and Figure 2 As shown, the breakdown voltage testing device 10 includes a cup body 100 and a cup cover 200. Among them, the cup body 100 is used to hold the insulating medium to be tested, and its shape can be flexibly designed as a cube, a cylinder or other geometric shapes according to actual needs to meet the requirements of different test scenarios or operating habits. The cup cover 200 is detachably connected to the top of the cup body 100. Correspondingly, the shape of the cup cover 200 can also be adapted according to the design of the cup body 100 to ensure that the two can be tightly connected and maintain good sealing performance.

[0037] To prevent the intrusion of external pollutants or the leakage of insulating media during the test, the joint between the cup body 100 and the cup cover 200 can adopt a sealing design. Thus, the purity of the test environment can be guaranteed, and potential safety hazards caused by the leakage of insulating media can be avoided, further improving the reliability and safety of the test.

[0038] It should be noted that both the cup body 100 and the cup cover 200 need to be set as insulating parts. The insulating property enables the cup body 100 and the cup cover 200 to effectively isolate the current under high-voltage test conditions, avoiding the risk of electric leakage or electric arc caused by the conductivity of the material. At the same time, it can reduce the influence of external electromagnetic interference on the test results. Thus, the stability of the breakdown voltage testing device 10 in a high-voltage environment can be significantly improved, providing a basic guarantee for efficient and safe breakdown voltage testing.

[0039] Figure 3 This is a cross-sectional view of the breakdown voltage testing device provided by the embodiment of the present application. Referring to Figure 3As shown, the breakdown voltage test device 10 further includes at least one electrode group 300, and the electrode group 300 is integrated on the cup cover 200. Compared with the traditional device in which the electrode group 300 is integrated on the cup body 100, when replacing the insulating medium, complex disassembly operations need to be performed on the electrode group 300 first. In the embodiment of the present application, by connecting the electrode group 300 to the cup cover 200, when replacing the insulating medium, the operator only needs to open the cup cover 200 and replace the insulating medium in the cup body 100, without performing disassembly operations on the electrode group 300. In this way, problems such as contact wear or poor contact caused by frequent disassembly of the electrode group 300 can be effectively avoided, thus significantly improving the stability of the test and the consistency of the test results. At the same time, without directly contacting the electrode group 300 or the charged components related to the electrode group 300, the risk of electric shock caused by accidental contact with high-voltage components is also greatly reduced.

[0040] In addition, since the electrode group 300 is installed on the cup cover 200 in the embodiment of the present application, there is no need to disassemble the electrode group 300 when replacing the insulating medium, and the spacing error that may be caused by the disassembly and assembly operations is also avoided. Therefore, there is no need to readjust or calibrate the spacing between the electrode groups 300 after replacing the insulating medium. With such a setting, not only are the operation steps simplified and the test convenience is improved, but also the error that may be introduced by manual intervention is avoided, further improving the test efficiency.

[0041] Continue to refer to Figure 3 As shown, each electrode group 300 is composed of a pair of oppositely arranged electrodes 310. The oppositely arranged electrodes 310 can accurately construct the electric field distribution, ensuring the uniformity and controllability of the electric field during the breakdown voltage test.

[0042] The shape of the end 314 of the electrode 310 can be flexibly designed according to the test requirements. The ends 314 of different-shaped electrodes 310 can adapt to specific test scenarios or standard requirements by changing the electric field distribution characteristics (such as electric field uniformity, concentration, or gradient distribution). Exemplarily, the shape of the end 314 of the electrode 310 can be a flat plate, a cone, a spherical cap, a cylinder, a needle, or other geometric forms.

[0043] In addition, the electrode group 300 adopts a design with adjustable spacing, and the operator can adjust the spacing between the two electrodes 310 according to specific test requirements, thereby improving the flexibility of the breakdown voltage test device 10 and achieving precise control of the electric field strength.

[0044] In a possible implementation, two electrodes 310 in the electrode group 300 can be respectively set as a fixed electrode 311 and an adjustable electrode 312. Among them, the fixed electrode 311 is fixedly connected to the cup lid 200 to ensure its constant position during the test, providing a stable reference point for the establishment of the electric field. The adjustable electrode 312 is movably connected to the cup lid 200 and can flexibly adjust the distance between it and the fixed electrode 311 within a preset range, thereby precisely controlling the electric field intensity.

[0045] Continue to refer to Figure 3 As shown, the breakdown voltage testing device 10 further includes an adjustment assembly 400. The adjustment assembly 400 is installed on the cup lid 200 and is connected to the electrode group 300. The adjustment assembly 400 is used to adjust the distance between two relatively arranged electrodes 310 in the electrode group 300.

[0046] Specifically, the adjustment assembly 400 includes an adjustment knob 410 and a transmission assembly 420. Among them, the adjustment knob 410 is rotatably arranged outside the cup lid 200 for easy manual control by the operator. The transmission assembly 420 is located inside the cup lid 200, with one end connected to the adjustment knob 410 and the other end connected to the adjustable electrode 312.

[0047] Figure 4 This is a top view of the breakdown voltage testing device provided by the embodiment of the present application. Refer to Figure 4 As shown, the transmission assembly 420 may include a driving gear 421 and a driven rack 422. Among them, the driving gear 421 is fixedly connected to the rotating shaft of the adjustment knob 410 and rotates synchronously with the rotation of the adjustment knob 410. The driven rack 422 meshes with the driving gear 421 and is connected to the adjustable electrode 312 through mechanical connection means such as a fixture.

[0048] When the operator rotates the adjustment knob 410, the driving gear 421 drives the driven rack 422 to move in a straight line direction, thereby driving the adjustable electrode 312 to displace relative to the fixed electrode 311, achieving precise adjustment of the distance between the electrodes 310.

[0049] In this way, the operator can complete the adjustment of the distance between the adjustable electrode 312 and the fixed electrode 311 by rotating the adjustment knob 410 without opening the cup lid 200 or contacting the internal electrode 310, which not only ensures the safety of the operation but also ensures the convenience and accuracy of the adjustment process.

[0050] Refer to Figure 4As shown, a scale 500 can also be provided on the surface of the cup lid 200. The scale 500 can visually reflect the actual distance between the adjustable electrode 312 and the fixed electrode 311 through scale markings or digital displays. The scale 500 can be arranged parallel to the moving direction of the adjustable electrode 312, so as to be accurately matched with the transmission component 420 of the adjustment component 400, ensuring that the operator can quickly judge the distance between the adjustable electrode 312 and the fixed electrode 311 by observing the scale of the scale 500.

[0051] To ensure the strict correspondence between the scale 500 and the actual distance of the electrode 310 and avoid visual errors in manual reading. The adjustment component 400 can also include an indicator 430 (see Figure 4 as shown). One end of the indicator 430 is fixedly connected to the transmission component 420 by a mechanical linkage, and the other end extends to the area of the scale 500 on the surface of the cup lid 200, for indicating the corresponding scale on the scale 500.

[0052] The end of the indicator 430 pointing to the scale 500 can be designed as an arrow, a marking line or other highly recognizable indication forms. In this way, the clear indication form can reduce adjustment errors caused by visual errors or misreading of scales, improving the accuracy and reliability of the test.

[0053] When the operator drives the transmission component 420 through the adjustment knob 410, the displacement of the transmission component 420 will synchronously drive the indicator 430 to move, enabling it to accurately align with the corresponding scale value on the scale 500. Thus, the change in the distance of the electrode 310 is visually displayed.

[0054] Exemplarily, the position of the fixed electrode 311 corresponding to the scale of the scale 500 can be set to zero as a reference benchmark. In this way, when the adjustment knob 410 drives the adjustable electrode 312 to move, the scale value displayed by the indicator 430 on the scale 500 is the distance between the adjustable electrode 312 and the fixed electrode 311. This design not only simplifies the process of reading the distance but also avoids errors that may be introduced by multi-step calculations, further improving the efficiency and reliability of the test.

[0055] In addition, it should be noted that at least two electrode groups 300 can be provided, and the shapes of the ends 314 of the electrodes 310 in different electrode groups 300 are different from each other. Exemplarily, two electrode groups 300 can be provided, which are respectively defined as the first electrode group 320 and the second electrode group 330 (see Figure 3 as shown).

[0056] Exemplarily, the end 314 of the electrode 310 in the first electrode group 320 can adopt a spherical cap or hemispherical electrode design, and its curved surface structure can effectively optimize the uniformity of the electric field distribution, significantly reducing the measurement error caused by electric field distortion or edge effect during the test, and is especially suitable for high-precision test scenarios. The end 314 of the electrode 310 in the second electrode group 330 can adopt a flat electrode design, which can provide a stable and uniform electric field environment to meet the standard breakdown voltage test requirements of conventional insulating media (such as transformer oil, synthetic ester insulating fluids, etc.).

[0057] In this way, by integrating multiple groups of electrodes 310 with different end 314 shapes, the breakdown voltage test device 10 can be flexibly adapted to different test standards, material properties or scientific research needs without replacing the overall structure or disassembling the electrode group 300. Such a setting not only avoids the mechanical wear and calibration errors caused by frequent replacement of the electrode group 300 in the traditional device, but also significantly improves the test efficiency by reducing the operation steps.

[0058] At the same time, the integrated layout of multiple electrode groups 300 provides a technical basis for the performance evaluation of insulating media under different electric field conditions, enabling a comprehensive analysis of the voltage withstand characteristics, aging trends and defect responses of materials, thereby providing high-adaptability and high-reliability test support for the condition assessment of power equipment and the research and development innovation of insulating materials.

[0059] During the test, the distance between the effectively used electrode groups 300 is set to the international standard distance value (taking 2.5 mm as an example in this embodiment), while the distance between another pair of electrode groups 300 is greater than the standard distance value (taking 5 mm as an example in this embodiment). Since the distance between the electrodes 310 is a key factor affecting the breakdown voltage, when the electrode group 300 with a distance of 2.5 mm breaks down, the electrode group 300 with a distance greater than 5 mm will not break down due to insufficient electric field strength, thus ensuring that the test result only reflects the performance of the effective electrode group 300.

[0060] When it is necessary to switch the electrode group 300 to be used, only need to adjust the distance between the target electrode group 300 to 2.5 mm by adjusting the knob 410, and at the same time adjust the distance between the electrodes 310 in another group of electrode groups 300 to be greater than 5 mm. This design not only simplifies the operation process of electrode switching, but also avoids the interference problem caused by multiple electrode groups 300 participating in the test at the same time, significantly improving the test accuracy and efficiency.

[0061] In a possible implementation, when multiple electrode groups 300 are provided in the test device, adjacent electrode groups 300 can share a common electrode 313 to optimize the structural design and improve the test efficiency. The common electrode 313, as a shared component of adjacent electrode groups 300, is usually designed as a fixed electrode 311 and fixed to the cup lid 200 through a rigid bracket to ensure its constant position during the test and provide a stable reference point for the establishment of the electric field.

[0062] Exemplarily, when two electrode groups are provided, a pair of end heads 314 facing away from each other can be respectively provided at both ends of the common electrode 313 (see Figure 3 shown), and the shapes of the two end heads 314 are different and respectively match the corresponding adjustable electrodes 312. For example, one end of the common electrode 313 can be designed as a spherical cap or a hemispherical end head 314 for forming a uniform electric field distribution with the adjustable electrode 312 of the first electrode group 320. The other end is designed as a flat end head 314 for constructing a conventional electric field environment with the adjustable electrode 312 of the second electrode group 330.

[0063] Alternatively, when three electrode groups 300 are provided, the three end heads 314 of the common electrode 313 face different directions (such as being spaced at 120 degrees), and the shape of each end head 314 matches the corresponding adjustable electrode 312 to form three independent test channels. Of course, when four electrode groups 300 are provided, at this time, four end heads 314 can be respectively provided around the common electrode 313, and the shape of each end head 314 respectively matches the corresponding adjustable electrode 312.

[0064] In this way, through the multi-directional end head 314 layout of the common electrode 313, the efficient integration of multiple electrode groups 300 in a limited space can be achieved, which not only avoids the complexity and space occupation of independently providing multiple electrode groups 300, but also ensures that the electric field distribution characteristics of each electrode group 300 meet the test requirements. At the same time, through the differential design of the shapes of the end heads 314, the test device can quickly switch test conditions (such as uniform electric field, high-gradient electric field, etc.), significantly improving the flexibility and efficiency of the test and providing a highly adaptable solution for the performance evaluation of insulating media.

[0065] In addition, the rapid switching of multiple electrode groups 300 can also be achieved through the common electrode 313. Specifically, the common electrode 313, as the fixed electrode 311, remains stationary, and only the position of the adjustable electrode 312 in the electrode group 300 to be used needs to be adjusted so that the distance between it and the common electrode 313 is adjusted to 2.5 mm, and then the electrode group 300 can be activated for testing.

[0066] Meanwhile, the adjustable electrode 312 of the unused electrode group 300 is adjusted to a distance greater than 5 mm from the common electrode 313 to ensure that breakdown does not occur during the test, thus avoiding interference with the test results. This design not only simplifies the operation process of electrode 310 switching, but also reduces the complexity of adjustment and the sources of error by fixing the position of the common electrode 313, significantly improving the test efficiency and flexibility.

[0067] In addition, the breakdown voltage test device 10 further includes electrode terminals 600 (see Figure 3 and Figure 4 shown), the electrode terminals 600 are passed through the cup cover 200, one end of which is connected to the electrode 310 in the electrode group 300, and the other end is connected to a step-up transformer (not shown in the figure).

[0068] The electrode terminals 600 are usually made of highly conductive materials to ensure that the high-voltage electrical signals generated by the step-up transformer are efficiently and stably transmitted to the electrode 310, thereby forming a stable electric field between the fixed electrode 311 and the adjustable electrode 312 to provide electrical support for the breakdown voltage test.

[0069] Of course, the contact part between the electrode terminals 600 and the cup cover 200 can be wrapped or isolated with insulating materials to prevent the leakage of high-voltage electrical signals or the risk of electric shock to the operator.

[0070] In addition, the number of electrode terminals 600 depends on the configuration of the electrode group 300. Usually, two electrode terminals 600 need to be set for each electrode group 300, which are respectively connected to two relatively arranged electrodes for easy separate control and use.

[0071] Alternatively, only two electrode terminals 600 can be set, and the tests of different electrode groups 300 can be realized by switching the connection mode. Specifically, the electrode terminals 600 can be connected to the target electrode group 300 through a pluggable connector or a changeover switch. When it is necessary to test a certain electrode group 300, only the electrode terminals 600 need to be connected to the electrode 310 of this electrode group 300. And the unused electrode groups 300 remain disconnected. In this way, not only can the number of electrode terminals 600 be reduced and the structure of the breakdown voltage test device 10 be simplified, but also the efficient switching of multiple electrode groups 300 can be realized through a flexible connection mode, significantly improving the convenience and adaptability of the test.

[0072] The embodiments or implementation manners in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0073] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and 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 application.

Claims

1. A breakdown voltage testing device, characterized in that, Comprising: A cup body for containing an insulating medium; A cup lid detachably connected to the top of the cup body; At least one electrode group connected to the cup lid; each electrode group includes two electrodes arranged oppositely; An adjusting assembly mounted on the cup lid and connected to the electrode group, the adjusting assembly adjusting the distance between the two oppositely arranged electrodes.

2. The test device according to claim 1, wherein There are at least two electrode groups, and the shapes of the ends of the electrodes in different electrode groups are different.

3. The testing device according to claim 2, wherein The electrode includes a common electrode which is shared by two adjacent electrode groups, and the common electrode includes at least a pair of ends arranged back to back, and the shapes of the two ends arranged back to back are different.

4. The test device according to any one of claims 1-3, characterized in that, Each electrode group includes a fixed electrode and an adjustable electrode, the position of the fixed electrode is fixed, and the adjusting assembly is connected to the adjustable electrode.

5. The test device according to any one of claims 1 to 3, characterized in that The adjusting assembly includes: An adjusting knob rotatably provided on the cup lid; A transmission assembly connected between the adjusting knob and the electrode group, the adjusting knob driving the transmission assembly to move, and the transmission assembly driving the electrode group to move to adjust the distance between the two electrodes.

6. The testing device according to claim 5, wherein The transmission assembly includes: A driving gear connected to the adjusting knob; A driven rack meshing with the driving gear and connected to the electrode group.

7. The test device according to any one of claims 1-3, characterized in that, A scale is provided on the surface of the cup lid, and the scale can indicate the distance between the two oppositely arranged electrodes.

8. The test device according to claim 7, characterized in that, The adjusting assembly includes: An indicating member indicating the position of the electrode on the scale.

9. The test device according to any one of claims 1-3, characterized in that, It further includes: An electrode terminal passing through the cup lid and connected to the electrode, and the electrode terminal is configured to be connected to a step-up transformer.

10. The test device according to any one of claims 1-3, characterized in that, The cup body, the cup lid and the adjusting assembly are insulating parts.

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