Synthetic air potential transformer verification device

Abstract

The application relates to a synthetic air voltage transformer verification device, which comprises a shell, a high-voltage wiring terminal, a wiring box and a core mechanism. The shell is provided with an air chamber for accommodating a primary coil to be verified, and the air chamber is connected with an air charging valve; the high-voltage wiring terminal is arranged in the shell, and at least part of the high-voltage wiring terminal penetrates into the air chamber, the high-voltage wiring terminal is used for connecting the primary coil and a high-voltage line; the core mechanism is arranged in the air chamber, the core mechanism comprises a core part and an iron yoke, the core part and the iron yoke are detachably connected, and the core part and the iron yoke form a closed ring, the core part is provided with a secondary winding, and the core part is used for being detachably arranged in the primary coil; the wiring box is arranged outside the shell, and the wiring box is used for being electrically connected with the core mechanism and the secondary winding.

Description

Technical Field

[0001] This application relates to the field of voltage transformer technology, and in particular to a verification device for synthetic air voltage transformers. Background Technology

[0002] A synthetic air voltage transformer is a type of voltage transformer that uses synthetic air as the insulating medium. It utilizes the principle of electromagnetic induction to proportionally transform the voltage in a high-voltage system into a low-voltage system for use in measurement, protection, and automatic control devices.

[0003] The primary winding is the winding component in a voltage transformer that directly connects to the high-voltage circuit being measured, and it is also one of the core components for voltage transformation. The primary winding typically includes a first winding and a high-voltage shield surrounding it. In related technologies, the disassembly and commissioning of voltage transformers requires disassembling the laminated iron core, which makes the design and verification of the primary winding quite difficult, causing significant challenges to the design and manufacturing of voltage transformer products. Summary of the Invention

[0004] Therefore, it is necessary to provide a verification device for synthetic air voltage transformers to enable rapid disassembly, installation, and commissioning of the product.

[0005] This application provides a synthetic air voltage transformer verification device for verifying the primary coil of a synthetic air voltage transformer, comprising:

[0006] The housing has an air chamber for accommodating a primary coil to be verified, and the air chamber is connected to an inflation valve;

[0007] A high-voltage terminal block is provided through the housing, and at least a portion of the high-voltage terminal block extends into the gas chamber. The high-voltage terminal block is used to connect the primary coil to the high-voltage line.

[0008] A core mechanism is disposed in the air chamber. The core mechanism includes a core and a yoke. The core and the yoke are detachably connected and form a closed loop. The core is wound with a secondary winding and is detachably inserted into the primary coil.

[0009] A junction box is disposed outside the housing and is used for electrical connection with the iron core mechanism and the secondary winding.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the yoke includes a bottom beam disposed opposite to the core, a first column connected to one end of the bottom beam, and a second column connected to the other end of the bottom beam. One end of the core is detachably connected to the first column, and the other end of the core is detachably connected to the second column.

[0012] In one embodiment, the first column is provided with a first mounting groove that extends through one end of the first column away from the bottom beam; the second column is provided with a second mounting groove that extends through one end of the second column away from the bottom beam; one end of the core is inserted into the first mounting groove, and the other end of the core is provided in the second mounting groove.

[0013] In one embodiment, it further includes:

[0014] A bottom shielding component, which covers the side of the bottom beam near the core;

[0015] A first side shielding component covers the side of the first column closest to the second column;

[0016] The second side shielding member covers the side of the second column closest to the first column.

[0017] In one embodiment, the first side shielding member includes a first shielding plate and a first shielding cover. The first shielding plate is fixedly connected to the first column, and the first shielding cover is detachably connected to the first shielding plate. A first clearance hole is formed between the first shielding cover and the first shielding plate, which is aligned with the first mounting groove and is used to allow the core to pass through. The first shielding cover is used to confine the core in the first mounting groove.

[0018] The second side shielding component includes a second shielding plate and a second shielding cover. The second shielding plate is fixedly connected to the second column, and the second shielding cover is detachably connected to the second shielding plate. A second clearance hole is formed between the second shielding cover and the second shielding plate, which is aligned with the second mounting groove and is used for the core to pass through. The second shielding cover is used to confine the core in the second mounting groove.

[0019] In one embodiment, the housing includes a housing body and an insulator, the air chamber is formed in the housing body, the housing body also has an opening communicating with the air chamber, the insulator is connected to the housing body and covers the opening, one end of the high-voltage terminal is inserted through the insulator, and the other end of the high-voltage terminal extends into the air chamber.

[0020] In one embodiment, the length of the portion of the high-voltage terminal extending into the gas chamber is adjustable.

[0021] In one embodiment, one end of the high-voltage terminal is threadedly connected to the insulator;

[0022] And / or, the high-voltage terminal includes a connector and a telescopic conductive rod, the connector is connected to the insulator, one end of the telescopic conductive rod is connected to the connector, and the other end of the telescopic conductive rod is used to connect to the primary coil, the telescopic conductive rod being able to extend and retract along its own axial direction.

[0023] In one embodiment, the retractable conductive rod includes:

[0024] A base for connecting to the primary coil;

[0025] A connecting sleeve, one end of which is connected to the base;

[0026] A telescopic rod, which is telescopically inserted through the other end of the connecting sleeve, and the telescopic rod abuts against the connecting seat;

[0027] An elastic element is disposed in the connecting sleeve, one end of the elastic element is connected to the base, and the other end of the elastic element is connected to the telescopic rod.

[0028] In one embodiment, the air chamber is also connected to an explosion-proof valve.

[0029] In the aforementioned synthetic air voltage transformer verification device, the primary coil to be verified is fitted onto the core of the core mechanism, and insulating gas is introduced into the air chamber through an air filling valve. The primary coil is then connected to the high-voltage line via high-voltage terminals, and the junction box is electrically connected to the core mechanism and the secondary winding. This simulates the working state of the primary coil in a real voltage transformer, enabling performance verification of the primary coil. Furthermore, compared to traditional laminated cores, the core mechanism of the synthetic air voltage transformer verification device of this application is configured with a separable core and yoke. Simply removing the core from the yoke allows for quick installation or disassembly of the primary coil, facilitating the disassembly and installation adjustment of primary coils with different parameters. This helps solve the current difficulties in primary coil verification and provides convenience for the research and design of voltage transformer products. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0033] Figure 1 This is a structural cross-sectional view of a synthetic air voltage transformer verification device according to an embodiment.

[0034] Figure 2 for Figure 1 The side view of the synthetic air voltage transformer verification device shown.

[0035] Figure 3 This is an exploded view of the core mechanism of a synthetic air voltage transformer verification device according to an embodiment.

[0036] Figure 4 for Figure 3 The left view of the iron core mechanism shown.

[0037] Figure 5 for Figure 3 The right view of the iron core mechanism shown.

[0038] Figure 6 An exploded view of the core mechanism of a synthetic air voltage transformer verification device according to another embodiment.

[0039] Figure 7 for Figure 6 The diagram shows the structure of the iron core mechanism (the primary coil and secondary winding are hidden).

[0040] Figure 8 for Figure 7 The diagram shows a front view of the core mechanism.

[0041] Figure 9 This is an exploded view of the structure of the first side shield of a synthetic air voltage transformer verification device according to an embodiment.

[0042] Figure 10 This is an exploded view of the structure of the second-side shield of a synthetic air voltage transformer verification device according to an embodiment.

[0043] Figure 11 This is a cross-sectional view of the retractable conductive rod of a synthetic air voltage transformer verification device according to an embodiment.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Shell; 11. Shell body; 111. Air chamber; 112. Opening; 12. Insulator; 13. Air filling valve; 14. Junction box; 15. Explosion-proof valve; 20. High-voltage terminal; 21. Connecting seat; 22. Telescopic conductive rod; 221. Base; 222. Connecting sleeve; 223. Telescopic rod; 224. Elastic element; 30. Core mechanism; 31. Core; 311. Secondary winding; 32. Yoke; 321. Bottom beam; 32 2. First column; 3221. First mounting slot; 323. Second column; 3231. Second mounting slot; 41. Bottom shield; 42. First side shield; 421. First shielding plate; 422. First shielding cover; 423. First clearance hole; 43. Second side shield; 431. Second shielding plate; 432. Second shielding cover; 433. Second clearance hole; 90. Primary coil; 91. Primary winding; 92. High voltage shield. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0052] As mentioned in the background section, the design of the primary coil is difficult in the current voltage transformer product development process, and it usually requires multiple disassembly and assembly to verify the performance of the primary coil. However, the structure of the laminated iron core of the traditional voltage transformer makes disassembly and assembly quite difficult.

[0053] Based on this, the present application provides a synthetic air voltage transformer verification device for verifying the primary winding 90 of the synthetic air voltage transformer. For example, it can be used to verify whether the number of turns of the primary winding 91 in the primary winding 90 is reasonable, and whether the high-voltage shield 92 is effective. See details below. Figure 1 as well as Figure 2 One embodiment of a synthetic air voltage transformer verification device includes a housing 10, a high-voltage terminal block 20, a junction box 14, and an iron core mechanism 30.

[0054] Specifically, the housing 10 is provided with a gas chamber 111 for accommodating the primary coil 90 to be verified, and the gas chamber 111 is connected to an inflation valve 13. It is readily understood that the inflation valve 13 is used to fill the gas chamber 111 with insulating gas to ensure that the primary coil 90 is in an insulating environment during verification. Optionally, the insulating gas may include dry air, nitrogen, sulfur hexafluoride, etc.

[0055] The high-voltage terminal 20 is disposed in the housing 10, and at least a portion of the high-voltage terminal 20 is inserted into the gas chamber 111. The high-voltage terminal 20 is used to connect the primary coil 90 to the high-voltage line.

[0056] Combination Figure 3 The core mechanism 30 is disposed in the air chamber 111. The core mechanism 30 includes a core 31 and a yoke 32. The core 31 and the yoke 32 are detachably connected and form a closed loop. The core 31 is wound with a secondary winding 311. The core 31 is detachably inserted into the primary coil 90 so that the secondary winding 311 and the primary winding 91 in the primary coil 90 form an electromagnetic induction, thereby realizing the proportional conversion of the voltage in the high voltage line to the low voltage.

[0057] Junction box 14 is disposed outside housing 10 and is used for electrical connection with core mechanism 30 and secondary winding 311. Junction box 14 outputs electrical signals from secondary winding 311 to verify primary coil 90.

[0058] In the aforementioned synthetic air voltage transformer verification device, the primary coil 90 to be verified is fitted onto the core 31 of the core mechanism 30, and insulating gas is introduced into the air chamber 111 through the air filling valve 13. The primary coil 90 is then connected to the high-voltage line via the high-voltage terminal 20, and the junction box 14 electrically connects the core mechanism 30 and the secondary winding 311. This simulates the working state of the primary coil 90 in a real voltage transformer, enabling performance verification of the primary coil 90. Furthermore, compared to the laminated core in traditional voltage transformers, the core mechanism 30 of the synthetic air voltage transformer verification device of this application is configured with a separable core 31 and yoke 32. The primary coil 90 can be quickly installed or disassembled simply by removing the core 31 from the yoke 32. This facilitates the disassembly and installation adjustment of primary coils 90 with different parameters, helping to solve the current difficulties in verifying primary coils 90 and providing convenience for the research and design of voltage transformer products.

[0059] See also Figure 3, optionally, in some embodiments, the yoke 32 includes a bottom beam 321 disposed opposite to the core 31, a first upright column 322 connected to one end of the bottom beam 321, and a second upright column 323 connected to the other end of the bottom beam 321. One end of the core 31 is detachably connected to the first upright column 322, and the other end of the core 31 is detachably connected to the second upright column 323. In other words, the yoke 32 is integrally in a "U" - shaped structure, the core 31 is in a straight - bar - shaped structure, and the yoke 32 and the core 31 together enclose a "mouth" - shaped structure. By detachably connecting the two ends of the core 31 to the first upright column 322 and the second upright column 323 respectively in a one - to - one correspondence, it is convenient to quickly disassemble and assemble the core 31 from the yoke 32, and thus convenient to disassemble and assemble the primary winding package 90.

[0060] See Figure 4 and Figure 5 , in some embodiments, the first upright column 322 is provided with a first installation groove 3221, the first installation groove 3221 penetrates through the end of the first upright column 322背离底梁321 (away from the bottom beam 321), the second upright column 323 is provided with a second installation groove 3231, the second installation groove 3231 penetrates through the end of the second upright column 323背离底梁321 (away from the bottom beam 321). One end of the core 31 is inserted into the first installation groove 3221, and the other end of the core 31 is arranged in the second installation groove 3231. Thus, during disassembly, by lifting the core 31 upward, the core 31 can be quickly separated from the yoke 32, so as to quickly disassemble and assemble the primary winding package 90. When the disassembly and assembly of the primary winding package 90 are completed, by putting the two ends of the core 31 into the first installation groove 3221 and the second installation groove 3231 from top to bottom, the quick installation of the core 31 and the primary winding package 90 can be achieved.

[0061] See Figure 6 and Figure 7 , optionally, in some embodiments, the synthetic air voltage transformer verification device further includes a bottom shielding member 41, a first side shielding member 42, and a second side shielding member 43. The bottom shielding member 41 covers the side of the bottom beam 321 close to the core 31, the first side shielding member 42 covers the side of the first upright column 322 close to the second upright column 323; the second side shielding member 43 covers the side of the second upright column 323 close to the first upright column 322, thereby preventing the magnetic field in the yoke 32 from interfering with the primary winding 91 and the secondary winding 311.

[0062] Specifically, see Figure 8 and Figure 9In some embodiments, the first side shield 42 includes a first shielding plate 421 and a first shielding cover 422. The first shielding plate 421 is fixedly connected to the first column 322, and the first shielding cover 422 is detachably connected to the first shielding plate 421. A first clearance hole 423 is formed between the first shielding cover 422 and the first shielding plate 421, which is aligned with the first mounting groove 3221 and is used for the core 31 to pass through. The first shielding cover 422 is used to confine the core 31 in the first mounting groove 3221. By configuring the first side shield 42 as a separable first shielding plate 421 and first shielding cover 422, the shielding effect of the first side shield 42 can be guaranteed without affecting the separable design of the core 31 and the first column 322. In addition, using the first shielding cover 422 to confine the core 31 in the first mounting groove 3221 can improve the stability of the core 31 during operation. Optionally, the first shielding plate 421 and the first shielding cover 422 can be detachably connected by means of snap-fit, interference fit or screw connection.

[0063] Similarly, see Figure 8 as well as Figure 10 The second-side shielding component 43 includes a second shielding plate 431 and a second shielding cover 432. The second shielding plate 431 is fixedly connected to the second column 323, and the second shielding cover 432 is detachably connected to the second shielding plate 431. A second clearance hole 433 is formed between the second shielding cover 432 and the second shielding plate 431, which is aligned with the second mounting groove 3231 and is used for the core 31 to pass through. The second shielding cover 432 is used to confine the core 31 in the second mounting groove 3231. By configuring the second-side shielding component 43 as a separable second shielding plate 431 and second shielding cover 432, the shielding effect of the second-side shielding component 43 can be guaranteed without affecting the separable design of the core 31 and the second column 323. In addition, using the second shielding cover 432 to confine the core 31 in the second mounting groove 3231 can improve the stability of the core 31 during operation. Optionally, the second shielding plate 431 and the second shielding cover 432 can be detachably connected by means of snap-fit, interference fit or screw connection.

[0064] See Figure 1 as well as Figure 2 Optionally, in some embodiments, the housing 10 includes a housing body 11 and an insulator 12. An air chamber 111 is formed in the housing body 11, and the housing body 11 also has an opening 112 communicating with the air chamber 111. The insulator 12 is connected to the housing body 11 and covers the opening 112. One end of the high-voltage terminal 20 passes through the insulator 12, and the other end of the high-voltage terminal 20 extends into the air chamber 111. By supporting the high-voltage terminal 20 with the insulator 12, a short circuit between the high-voltage terminal 20 and the housing body 11 can be avoided.

[0065] Optionally, in some embodiments, the length of the portion of the high-voltage terminal 20 extending into the air chamber 111 is adjustable so that the high-voltage terminal 20 can be adapted to primary coils 90 of different diameters, thereby improving the versatility of the synthetic air voltage transformer verification device.

[0066] Specifically, in some embodiments, one end of the high-voltage terminal 20 is threadedly connected to the insulator 12. Specifically, the insulator 12 has a threaded hole, and one end of the high-voltage terminal 20 has an external thread. By controlling the high-voltage terminal 20 to be screwed into the threaded hole, the length of the high-voltage terminal 20 in the air chamber 111 can be controlled to adapt to primary coils 90 of different diameters.

[0067] See also Figure 1 as well as Figure 2 Optionally, in some embodiments, the high-voltage terminal 20 may further include a connecting base 21 and a telescopic conductive rod 22. The connecting base 21 is connected to the insulator 12, one end of the telescopic conductive rod 22 is connected to the connecting base 21, and the other end of the telescopic conductive rod 22 is used to connect to the primary coil 90. The telescopic conductive rod 22 can extend and retract along its own axial direction. This allows the telescopic conductive rod 22 to adaptively adjust its axial length according to the diameter of the primary coil 90, ensuring that the high-voltage terminal 20 can adapt to primary coils 90 of different diameters.

[0068] Specifically, in combination Figure 11 In some embodiments, the telescopic conductive rod 22 includes a base 221, a connecting sleeve 222, a telescopic rod 223, and an elastic element 224. The base 221 is used to connect to the primary coil 90. One end of the connecting sleeve 222 is connected to the base 221. The telescopic rod 223 is telescopically inserted through the other end of the connecting sleeve 222, and abuts against the connecting seat 21. The elastic element 224 is disposed in the connecting sleeve 222, with one end connected to the base 221 and the other end connected to the telescopic rod 223. Thus, utilizing the elastic deformation capability of the elastic element 224, the telescopic rod 223 can automatically extend or retract according to the diameter of the primary coil 90, thereby adjusting the overall length of the high-voltage terminal 20 to accommodate primary coils 90 of different diameters. The elastic element 224 can be a linear spring.

[0069] Optionally, in some embodiments, a retractable conductive rod 22 is fixed on each primary coil 90 to be tested. After replacing the primary coil 90 with a new one, the telescopic rod 223 of the retractable conductive rod 22 is brought into contact with the connector 21 to complete the installation of the primary coil 90.

[0070] See Figure 1In some embodiments, the gas chamber 111 is also connected to an explosion-proof valve 15. Once the internal gas pressure of the gas chamber 111 rises abnormally, the explosion-proof valve 15 can quickly release the pressure to prevent an explosion and enhance the safety of equipment operation.

[0071] Understandably, in some embodiments, in order to avoid short circuits, a first insulating cylinder (not shown) is provided between the primary winding 91 and the secondary winding 311, and a second insulating cylinder (not shown) is provided between the secondary winding 311 and the core 31.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A verification device for a synthetic air voltage transformer, used to verify the primary coil of a synthetic air voltage transformer, characterized in that, include: The housing has an air chamber for accommodating a primary coil to be verified, and the air chamber is connected to an inflation valve; A high-voltage terminal block is provided through the housing, and at least a portion of the high-voltage terminal block extends into the gas chamber. The high-voltage terminal block is used to connect the primary coil to the high-voltage line. A core mechanism is disposed in the air chamber. The core mechanism includes a core and a yoke. The core and the yoke are detachably connected and form a closed loop. The core is wound with a secondary winding and is detachably inserted into the primary coil. A junction box is disposed outside the housing and is used for electrical connection with the iron core mechanism and the secondary winding.

2. The synthetic air voltage transformer verification device according to claim 1, characterized in that, The yoke includes a bottom beam disposed opposite to the core, a first column connected to one end of the bottom beam, and a second column connected to the other end of the bottom beam. One end of the core is detachably connected to the first column, and the other end of the core is detachably connected to the second column.

3. The synthetic air voltage transformer verification device according to claim 2, characterized in that, The first column is provided with a first mounting groove, which passes through one end of the first column away from the bottom beam; the second column is provided with a second mounting groove, which passes through one end of the second column away from the bottom beam; one end of the core is inserted into the first mounting groove, and the other end of the core is provided in the second mounting groove.

4. The synthetic air voltage transformer verification device according to claim 3, characterized in that, Also includes: A bottom shielding component, which covers the side of the bottom beam near the core; A first side shielding component covers the side of the first column closest to the second column; The second side shielding member covers the side of the second column closest to the first column.

5. The synthetic air voltage transformer verification device according to claim 4, characterized in that, The first side shielding component includes a first shielding plate and a first shielding cover. The first shielding plate is fixedly connected to the first column, and the first shielding cover is detachably connected to the first shielding plate. A first clearance hole is formed between the first shielding cover and the first shielding plate, which is aligned with the first mounting groove and is used for the core to pass through. The first shielding cover is used to confine the core in the first mounting groove. The second side shielding component includes a second shielding plate and a second shielding cover. The second shielding plate is fixedly connected to the second column, and the second shielding cover is detachably connected to the second shielding plate. A second clearance hole is formed between the second shielding cover and the second shielding plate, which is aligned with the second mounting groove and is used for the core to pass through. The second shielding cover is used to confine the core in the second mounting groove.

6. The synthetic air voltage transformer verification device according to claim 1, characterized in that, The housing includes a housing body and an insulator. The air chamber is formed in the housing body. The housing body also has an opening that communicates with the air chamber. The insulator is connected to the housing body and covers the opening. One end of the high-voltage terminal is inserted through the insulator, and the other end of the high-voltage terminal extends into the air chamber.

7. The synthetic air voltage transformer verification device according to claim 6, characterized in that, The length of the portion of the high-voltage terminal that extends into the gas chamber is adjustable.

8. The synthetic air voltage transformer verification device according to claim 7, characterized in that, One end of the high-voltage terminal is threadedly connected to the insulator. And / or, the high-voltage terminal includes a connector and a telescopic conductive rod, the connector is connected to the insulator, one end of the telescopic conductive rod is connected to the connector, and the other end of the telescopic conductive rod is used to connect to the primary coil, the telescopic conductive rod being able to extend and retract along its own axial direction.

9. The synthetic air voltage transformer verification device according to claim 8, characterized in that, The retractable conductive rod includes: A base for connecting to the primary coil; A connecting sleeve, one end of which is connected to the base; A telescopic rod, which is telescopically inserted through the other end of the connecting sleeve, and the telescopic rod abuts against the connecting seat; An elastic element is disposed in the connecting sleeve, one end of the elastic element is connected to the base, and the other end of the elastic element is connected to the telescopic rod.

10. The synthetic air voltage transformer verification device according to any one of claims 1-9, characterized in that, The air chamber is also connected to an explosion-proof valve.

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