Fixed vacuum capacitor with short circuit function

Abstract

The invention discloses a fixed vacuum capacitor with a short circuit function, which comprises a vacuum capacitor body, a movable conducting rod is arranged in the vacuum capacitor body, and the conducting rod is configured to connect two electrode groups of the vacuum capacitor body when the conducting rod deflects along a set direction so as to realize short circuit of the vacuum capacitor body. The movable conducting rod is arranged in the vacuum capacitor body, and when the conducting rod deflects, the two electrode groups can be connected to realize short circuit, so that the fixed vacuum capacitor has a short circuit function under the condition that the volume of the fixed vacuum capacitor is not changed; according to the design, the tedious problem that the circuit design of the radio frequency matcher needs to be changed by dismounting the fixed vacuum capacitor in specific scenes such as test and debugging of the radio frequency matcher and design of double-frequency and multi-frequency matchers is effectively solved, and the operation convenience is greatly improved; the specific requirements of a user for rapidly switching the working frequency and changing the circuit design of the radio frequency matcher are met, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of capacitor technology, and in particular to a fixed vacuum capacitor with short-circuit function. Background Technology

[0002] A vacuum capacitor is a type of capacitor that uses ceramic as its insulating shell, vacuum as its dielectric, and high-conductivity oxygen-free copper as its electrodes. There are two main types of vacuum capacitors: variable vacuum capacitors and fixed vacuum capacitors. The capacitance of a variable vacuum capacitor is changed by adjusting the coupling length of the two sets of electrodes, while the electrodes and capacitance of a fixed vacuum capacitor remain constant.

[0003] Traditional fixed vacuum capacitors consist of two electrode ring assemblies welded to upper and lower electrode disks, which are then welded to both ends of a ceramic tube, forming a vacuum chamber. The two electrode ring assemblies are sealed within the vacuum chamber and coupled to each other. Generally, the capacitance of a fixed vacuum capacitor is designed according to the user's needs by adjusting the length, wall thickness, and spacing of the electrode rings, as well as the height of the ceramic tube. After all components are assembled and welded, the positions of the electrodes and electrode disks in the fixed vacuum capacitor remain unchanged.

[0004] However, in certain application scenarios, such as the testing and debugging of RF matching devices and the design of dual-band and multi-band matching devices, users need to remove the fixed vacuum capacitor to change the circuit design of the RF matching device. This operation is not only cumbersome but also affects efficiency, making it difficult to meet the specific needs of users to quickly switch operating frequencies and change the circuit design of the RF matching device. Therefore, there is an urgent need for a fixed vacuum capacitor with short-circuit functionality to solve the above-mentioned problems in the existing technology. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a fixed vacuum capacitor with short-circuit function to overcome the shortcomings of existing fixed vacuum capacitors that cannot meet the specific needs of users to quickly switch operating frequencies and change the design of RF matching circuits.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a fixed vacuum capacitor with short-circuit function, comprising: a vacuum capacitor body, wherein a movable conductive rod is built into the vacuum capacitor body, the conductive rod being configured to connect two electrode groups of the vacuum capacitor body when it deflects along a set direction, thereby achieving a short circuit in the vacuum capacitor body; wherein, each of the two electrode groups includes an electrode disk, the conductive rod is disposed between the two electrode disks, and the conductive rod is sealed to one of the electrode disks through an elastic connector, while the other electrode disk is provided with a contact portion, and the conductive rod can abut against the contact portion when it deflects along the set direction.

[0007] As a further improvement of the present invention, the two electrode disks are respectively a first electrode disk and a second electrode disk. The second electrode disk has a second mounting hole. The conductive rod passes through the second mounting hole and extends toward the vacuum chamber inside the vacuum capacitor body. The elastic connector is sealed between the conductive rod and the second electrode disk. The contact part is provided on the first electrode disk.

[0008] As a further improvement of the present invention, the conductive rod is provided with a contact end inside the vacuum chamber and a driving end extending outside the vacuum chamber. An insulating limiting member is provided on the first electrode disk, and an elastic member is provided on the second electrode disk that always applies an elastic force to the driving end. In the non-short-circuit state, the conductive rod causes the contact end to abut against the insulating limiting member under the elastic force of the elastic member.

[0009] As a further improvement of the present invention, the first electrode disk has a first mounting hole, the insulating limiting member is fixed in the first mounting hole, and a conductive cover plate is sealed and fixed in the first mounting hole. The contact part is integrally disposed on the conductive cover plate, and the contact end is located between the contact part and the insulating limiting member.

[0010] As a further improvement of the present invention, the vacuum capacitor body includes a ceramic tube, which is sealed between the two electrode disks to form a closed vacuum chamber; each of the two electrode groups also includes an electrode ring group, which is fixed on the two electrode disks respectively and coupled to each other and housed in the vacuum chamber, and the conductive rod is located at the center of the two electrode ring groups.

[0011] As a further improvement of the present invention, in the non-short-circuit state, the distance between the conductive rod and the contact portion is greater than the distance between the two electrode ring groups.

[0012] As a further improvement of the present invention, the elastic connector is an annular metal sheet capable of elastic deformation.

[0013] As a further improvement of the present invention, the second electrode disk is provided with a first screw hole in the radial direction opposite to the driving end. An adjusting screw is installed in the first screw hole. The adjusting screw is used to push the driving end to make the conductive rod swing, so that the contact end abuts against the contact portion.

[0014] As a further improvement of the present invention, the fixed vacuum capacitor with short-circuit function also includes an eccentric screw, the eccentric screw having a screw portion and a screw frustum connected to the screw portion, the axis of the screw frustum being non-concentric with the axis of the screw portion; the second electrode disk is provided with a second screw hole axially on the side of the second mounting hole, the screw portion being threaded into the second screw hole, and the screw frustum being distributed on the side of the driving end; when the eccentric screw rotates, the screw frustum pushes the driving end, causing the conductive rod to swing, thereby causing the contact end to abut against the contact portion.

[0015] As a further improvement of the present invention, the fixed vacuum capacitor with short-circuit function also includes a power drive device, which is used to automatically drive the conductive rod to make a yaw motion along a set direction.

[0016] The beneficial effects of this invention are as follows: This invention provides a fixed vacuum capacitor with a short-circuit function. By incorporating a built-in movable conductive rod, which can connect two electrode groups to achieve a short circuit when the conductive rod is tilted, the fixed vacuum capacitor achieves a short-circuit function without changing its volume. This design effectively solves the cumbersome problem of needing to remove the fixed vacuum capacitor to change the RF matching circuit design in specific scenarios such as RF matching circuit testing, debugging, and dual-frequency and multi-frequency matching circuit design. The method of achieving a short circuit by simply controlling the tilt of the conductive rod greatly improves operational convenience, meets the specific needs of users to quickly switch operating frequencies and change the RF matching circuit design, and improves work efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.

[0018] Figure 1 This is a perspective view of a first embodiment of the fixed vacuum capacitor with short-circuit function of the present invention; Figure 2 This is a cross-sectional view of a fixed vacuum capacitor with short-circuit function according to an embodiment of the present invention in a non-short-circuit state; Figure 3 This is a perspective view of the conductive rod and elastic connector in the fixed vacuum capacitor with short-circuit function of the present invention; Figure 4 This is a perspective view of the conductive cover plate in the fixed vacuum capacitor with short-circuit function of the present invention; Figure 5 This is a cross-sectional view of a fixed vacuum capacitor with short-circuit function according to an embodiment of the present invention under short-circuit conditions. Figure 6 This is a perspective view of a second embodiment of the fixed vacuum capacitor with short-circuit function of the present invention; Figure 7 This is a cross-sectional view of Embodiment 2 of the fixed vacuum capacitor with short-circuit function of the present invention in the non-short-circuit state; Figure 8 This is a perspective view of the eccentric screw in Embodiment 2 of the fixed vacuum capacitor with short-circuit function of the present invention; Figure 9 This is a cross-sectional view of the fixed vacuum capacitor with short-circuit function according to Embodiment 2 of the present invention under short-circuit conditions; in, Figure 5 and Figure 9 The arrow in the diagram indicates the direction of the conductor rod's deflection.

[0019] Referring to the accompanying drawings, the following explanations are provided: 1. Conductive rod; 101. Contact end; 1011. Plane; 102. Driving end; 2. Elastic connector; 3. First electrode disk; 301. First mounting hole; 4. Second electrode disk; 401. Second mounting hole; 402. First screw hole; 403. Second screw hole; 404. Mounting threaded hole; 5. Insulating limiting component; 6. Elastic component; 7. Conductive cover plate; 701. Contact part; 8. Ceramic tube; 9. Adjusting screw; 10. Eccentric screw; 1001. Screw part; 1002. Screw frustum; 100. Vacuum chamber; 11. First electrode ring group; 12. Second electrode ring group. Detailed Implementation

[0020] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0022] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0024] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0025] Example 1

[0026] See Figures 1 to 5 The present invention provides a fixed vacuum capacitor with short-circuit function, comprising: a vacuum capacitor body, the vacuum capacitor body including two electrode groups, and a movable conductive rod 1 built into the vacuum capacitor body. The conductive rod 1 is configured to connect the two electrode groups of the vacuum capacitor body when it deflects along a set direction, so as to realize the short circuit of the vacuum capacitor body.

[0027] The fixed vacuum capacitor with short-circuit function of the present invention achieves short-circuit operation by incorporating a built-in movable conductive rod 1. When the conductive rod 1 is tilted, it can connect two electrode groups to achieve short-circuit operation. Without changing the volume of the fixed vacuum capacitor, the fixed vacuum capacitor has short-circuit function. This design effectively solves the cumbersome problem of having to remove the fixed vacuum capacitor to change the RF matching circuit design in specific scenarios such as RF matching test, debugging, and dual-frequency and multi-frequency matching circuit design. By simply controlling the tilt of the conductive rod 1 to achieve short-circuit operation, the convenience of operation is greatly improved, meeting the specific needs of users to quickly switch operating frequencies and change the RF matching circuit design, and improving work efficiency.

[0028] Furthermore, the vacuum capacitor body also includes a ceramic tube 8, which is a tubular shape with open ends, preferably circular. The ceramic tube 8 is made of ceramic material, which has excellent insulation properties and high mechanical strength, helping to maintain the vacuum state inside the vacuum capacitor body and ensuring that the vacuum capacitor operates safely and stably under high voltage conditions.

[0029] Furthermore, both electrode assemblies include electrode disks and electrode ring assemblies. In this embodiment, the two electrode disks are circular and adapted to the ceramic tube 8. The two electrode disks are respectively welded to the upper and lower ends of the ceramic tube 8, thereby forming a sealed cavity inside the vacuum capacitor body, and this sealed cavity is configured as a vacuum chamber 100. The two electrode ring assemblies are respectively welded to the opposite end faces of the two electrode disks, and the two electrode ring assemblies are coupled together and housed within the vacuum chamber 100.

[0030] like Figure 2 As shown, in this embodiment, both electrode ring groups are composed of multiple electrode rings of different diameters coaxially spaced together. The electrode rings of the two electrode ring groups are arranged alternately from the inside to the outside, and there is a gap between adjacent electrode rings. At the same time, at least part of the electrode rings of the two electrode ring groups extend into each other along the axial direction, and the relatively overlapping part is the coupling area of ​​the two electrode ring groups.

[0031] In this invention, the conductive rod 1 is disposed between two electrode disks and located at the center of the two electrode ring assemblies. The conductive rod 1 is sealed to one of the electrode disks via an elastic connector 2, while the other electrode disk is provided with a contact portion 701. In the non-short-circuit state, the conductive rod 1 is distributed along the axial direction of the vacuum capacitor body and has a certain distance between it and the contact portion 701. When the conductive rod 1 deflects in a set direction, it can abut against the contact portion 701.

[0032] In this invention, the conductive rod 1 is sealed to one of the electrode disks through the elastic connector 2. This design ensures both the mobility of the conductive rod 1 and the sealing of the vacuum chamber 100 inside the vacuum capacitor body, ensuring its stable operation under various working conditions.

[0033] For ease of distinction and understanding, this invention defines the two electrode disks as the first electrode disk 3 and the second electrode disk 4, and the two electrode ring groups as the first electrode ring group 11 and the second electrode ring group 12. For example... Figure 2 As shown, the first electrode disk 3 is welded to the upper end of the ceramic tube 8, and the first electrode ring group 11 is welded to the bottom surface of the first electrode disk 3; the second electrode disk 4 is welded to the lower end of the ceramic tube 8, and the second electrode ring group 12 is welded to the top surface of the second electrode disk 4.

[0034] The second electrode disk 4 has a second mounting hole 401 in the middle, the conductive rod 1 passes through the second mounting hole 401 and extends toward the vacuum chamber 100 inside the vacuum capacitor body, and the elastic connector 2 is sealed between the conductive rod 1 and the second electrode disk 4; the contact part 701 is provided on the first electrode disk 3.

[0035] Figure 3 This is a three-dimensional view of the assembled conductive rod 1 and elastic connector 2. The elastic connector 2 is a high-temperature resistant, annular metal sheet capable of elastic deformation, such as a molybdenum sheet, with a thickness preferably less than or equal to 0.05 mm to ensure excellent elastic deformation capability. Furthermore, the elastic connector 2 can be silver-plated before assembly to ensure reliable welding and electrical conductivity.

[0036] Preferably, in this embodiment, the second mounting hole 401 is provided with a step, the outer ring of the elastic connector 2 is welded to the step surface of the second mounting hole 401, and the inner ring of the elastic connector 2 is welded to the boss near the lower end of the conductive rod 1 to ensure the accuracy of the assembly position of the parts.

[0037] See Figure 2 and Figure 3 The conductive rod 1 has a contact end 101 (i.e., the upper end of the conductive rod 1) located inside the vacuum chamber 100 and a drive end 102 (i.e., the lower end of the conductive rod 1) extending outside the vacuum chamber 100. An insulating limiting member 5 is provided on the first electrode disk 3, and an elastic member 6 that always applies an elastic force to the drive end 102 is provided on the second electrode disk 4. In the non-short-circuit state, the contact end 101 of the conductive rod 1 abuts against the insulating limiting member 5 under the elastic force of the elastic member 6, ensuring the stable position of the conductive rod 1 and preventing the conductive rod 1 from malfunctioning and connecting the electrode group due to external factors, thus ensuring the stability and reliability of the vacuum capacitor during normal operation.

[0038] For example, the insulating limiter 5 may be an insulating rod made of ceramic material.

[0039] The conductive rod 1 can be made of a metal round bar with a certain mechanical strength. Preferably, the contact end 101 of the conductive rod 1 is processed into a flat shape, that is, both sides facing the contact part 701 and the insulating limiting member 5 are processed into flat surfaces 1011 to increase the contact area with the contact part 701 and the insulating limiting member 5. Similarly, the driving end 102 of the conductive rod 1 can also be processed into a flat shape to increase the contact surface with the elastic member 6 and the adjusting screw 9; in addition, the surface of the conductive rod 1 can also be silver-plated before assembly to ensure welding performance and conductivity.

[0040] See Figure 2 and Figure 4A first mounting hole 301 is provided in the middle of the first electrode disk 3, and an insulating limiting member 5 is welded horizontally into the first mounting hole 301. The contact end 101 of the conductive rod 1 is inserted into the first mounting hole 301 and abuts against the insulating limiting member 5. At the same time, a conductive cover plate 7 is also fixed in the first mounting hole 301. The conductive cover plate 7 and the first electrode disk 3 are sealed together by welding to ensure the airtightness of the vacuum chamber 100.

[0041] like Figure 4 As shown, a protrusion extends integrally downward from the bottom of the conductive cover plate 7, which is the contact portion 701 mentioned above. The contact end 101 of the conductive rod 1 is movably disposed between the contact portion 701 and the insulating limiting member 5.

[0042] The conductive cover plate 7 can be machined from a metal round bar, and its contact part 701 is machined with a vertical surface parallel to the axis of the vacuum capacitor body. During assembly, it is necessary to ensure that the vertical surface of the contact part 701 is parallel to the plane 1011 of the conductive rod 1.

[0043] In the non-short-circuit state, the distance between the conductive rod 1 and the contact part 701 (i.e., the distance between the plane 1011 and the vertical plane) is greater than the distance between the electrode rings of the first electrode ring group 11 and the electrode rings of the second electrode ring group 12, so as to ensure the withstand voltage of the vacuum capacitor.

[0044] In this invention, the elastic component 6 may be, but is not limited to, a spring or a tension spring.

[0045] like Figure 1 As shown, the elastic component 6 is a spring. One end of the spring elastically abuts against the circumferential wall of the circular groove of the second electrode disk 4, and the other end of the spring elastically abuts against the driving end 102 of the conductive rod 1. In the non-short-circuit state, the conductive rod 1, under the elastic force of the elastic component 6, causes the contact end 101 to abut against the insulating limiting component 5, ensuring the stable position of the conductive rod 1.

[0046] Of course, in other embodiments of the present invention, the elastic component 6 can be a tension spring, one end of which is connected to the second electrode disk 4, and the other end of which is connected to the driving end 102 of the conductive rod 1. The direction of the tension force applied by the tension spring to the driving end 102 is the same as the direction of the elastic force applied by the spring to the driving end 102. Similarly, the contact end 101 can abut against the insulating limiting component 5 in a non-short-circuit state, thus achieving the same technical effect.

[0047] In addition, the fixed vacuum capacitor with short-circuit function of the present invention also includes an adjusting screw 9. In this embodiment, the conductive rod 1 is pushed to make a yaw motion by manually adjusting the adjusting screw 9.

[0048] like Figure 5As shown, the second electrode disk 4 has a first screw hole 402 along the radial direction opposite to the drive end 102, and an adjusting screw 9 is installed in the first screw hole 402. By rotating the adjusting screw 9 with a tool, the adjusting screw 9 moves toward the drive end 102, and the adjusting screw 9 pushes the drive end 102 to tilt, thereby causing the conductive rod 1 to move along the elastic connector 2 as a fulcrum. Figure 5 The direction indicated by the middle arrow deflects until the contact end 101 comes into contact with the contact part 701, thereby achieving a short circuit in the vacuum capacitor body.

[0049] As can be seen, when a short-circuit function is required, the conductive rod 1 is deflected by operating the adjusting screw 9, thereby connecting the two electrode disks. This design makes the short-circuit operation simple, reliable, and easy to implement, meeting the specific needs of users to quickly switch operating frequencies and change the RF matching circuit design. Please refer to it again. Figure 1 Each of the two electrode disks has a plurality of evenly distributed mounting threaded holes 404 on its outer end faces facing each other, which are used to fix the vacuum capacitor to the circuit and achieve electrical connection.

[0050] Example 2

[0051] See Figures 6 to 9 The difference between this embodiment and embodiment one is that in this embodiment, an eccentric screw 10 is used instead of an adjusting screw 9 to drive the conductive rod 1 to make a yaw motion.

[0052] See Figure 8 The eccentric screw 10 has a screw portion 1001 and a screw frustum 1002 connected to the screw portion 1001. The diameter of the screw frustum 1002 is much larger than the diameter of the screw portion 1001, and the axis of the screw frustum 1002 is not concentric with the axis of the screw portion 1001.

[0053] See Figure 7 The second electrode disk 4 is located on the side of the second mounting hole 401 and is provided with a second screw hole 403 that is adapted to the screw part 1001 along the axial direction. The screw part 1001 of the eccentric screw 10 is threaded into the second screw hole 403, and the screw frustum 1002 is distributed on the side of the drive end 102.

[0054] like Figure 9 As shown, when the eccentric screw 10 rotates, the outer circumferential surface of the screw frustum 1002 abuts against the driving end 102 of the conductive rod 1. With further rotation of the eccentric screw 10, the screw frustum 1002 pushes the driving end 102 to tilt, thereby causing the conductive rod 1 to move along the elastic connector 2 as a fulcrum. Figure 9 The direction indicated by the middle arrow deflects until the contact end 101 comes into contact with the contact part 701, thereby achieving a short circuit in the vacuum capacitor body.

[0055] As can be seen, when a short-circuit function is required, the conductive rod 1 is pushed by the eccentric screw 10 to make it swing, thereby connecting the two electrode disks. This design makes the short-circuit operation simple, reliable and easy to implement, meeting the specific needs of users to quickly switch operating frequencies and change the RF matching circuit design.

[0056] To facilitate the rotation of the eccentric screw 10, a slotted or Phillips head slot can be provided on the end face of the screw frustum 1002, so that tools such as screwdrivers can be inserted into the slot to rotate the eccentric screw 10, thereby driving the conductive rod 1 to make an oscillating motion.

[0057] Example 3

[0058] In the above Embodiment 1 and Embodiment 2, the short-circuit function of the vacuum capacitor is controlled manually. Therefore, the present invention also provides Embodiment 3, which aims to replace the manual method in Embodiment 1 and Embodiment 2 with an automatic method to achieve short-circuit control.

[0059] In this embodiment, the fixed vacuum capacitor with short-circuit function also includes a power drive device, which is used to automatically drive the conductive rod 1 to swing along a set direction.

[0060] For example, the power drive device can be an electromagnetic mechanism, which is disposed on one side of the drive end 102 of the conductive rod 1. When the electromagnetic mechanism is energized, it can generate a magnetic attraction force on the drive end 102, causing the drive end 102 to be attracted to the electromagnetic mechanism and tilted, thereby causing the conductive rod 1 to swing about the elastic connector 2 as the fulcrum until the contact end 101 abuts against the contact part 701, thereby realizing the short circuit of the vacuum capacitor body.

[0061] For example, the power drive device can be a miniature electric push rod, replacing the adjusting screw 9 in Embodiment 1. When the miniature electric push rod extends, it pushes the drive end 102 to tilt, thereby causing the conductive rod to swing until the contact end 101 abuts against the contact portion 701, thereby achieving a short circuit in the vacuum capacitor body.

[0062] As can be seen, when a short-circuit function is required, the conductive rod 1 is automatically driven by the power drive device to swing and short-circuit the vacuum capacitor without manual operation, which further improves efficiency and enables the capacitor to adapt to more automated application scenarios, further enhancing its applicability in different working environments and broadening the application range of the product.

[0063] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fixed vacuum capacitor with a short-circuit function comprising a vacuum capacitor body, characterized by: The vacuum capacitor body is internally provided with a movable conductive rod (1), which is configured to connect two electrode groups of the vacuum capacitor body when it is deflected in a set direction, so as to realize short circuit of the vacuum capacitor body; wherein the two electrode groups each include an electrode disc, the conductive rod (1) is arranged between the two electrode discs, and the conductive rod (1) is sealingly connected with one of the electrode discs through an elastic connecting piece (2), and the other electrode disc is provided with a contact site (701) which can be abutted by the conductive rod (1) when the conductive rod (1) is deflected in a set direction.

2. The fixed vacuum capacitor with a short-circuit function according to claim 1, characterized by: The two electrode discs are respectively a first electrode disc (3) and a second electrode disc (4), the second electrode disc (4) is provided with a second mounting hole (401), the conductive rod (1) is arranged in the second mounting hole (401) and extends towards a vacuum chamber (100) inside the vacuum capacitor body, and the elastic connecting piece (2) is sealingly connected between the conductive rod (1) and the second electrode disc (4); the contact site (701) is arranged on the first electrode disc (3).

3. The fixed vacuum capacitor with a short-circuit function according to claim 2, characterized in that: The conductive rod (1) is provided with a contact end (101) in the vacuum chamber (100) and a driving end (102) extending out of the vacuum chamber (100), the first electrode disc (3) is provided with an insulating limiting piece (5), and the second electrode disc (4) is provided with an elastic component (6) which always applies an elastic force to the driving end (102); in a non-short circuit state, the contact end (101) is abutted against the insulating limiting piece (5) under the elastic force of the elastic component (6).

4. The fixed vacuum capacitor with a short-circuit function according to claim 3, characterized by: The first electrode disc (3) is provided with a first mounting hole (301), the insulating limiting piece (5) is fixed in the first mounting hole (301), and a conductive cover plate (7) is sealingly fixed in the first mounting hole (301), the contact site (701) is integrally arranged on the conductive cover plate (7), and the contact end (101) is located between the contact site (701) and the insulating limiting piece (5).

5. The fixed vacuum capacitor with a short-circuit function according to claim 1, characterized by: The vacuum capacitor body includes a porcelain tube (8) which is sealingly connected between the two electrode discs and forms a closed vacuum chamber (100); each of the two electrode groups further includes an electrode ring group, the two electrode ring groups are fixed on the two electrode discs and are coupled to each other and accommodated in the vacuum chamber (100), and the conductive rod (1) is located at the center position of the two electrode ring groups.

6. The fixed vacuum capacitor with a short-circuit function according to claim 5, characterized in that: In a non-short circuit state, the distance between the conductive rod (1) and the contact site (701) is greater than the distance between the two electrode ring groups.

7. The fixed vacuum capacitor with a short-circuit function according to claim 1, characterized by: The elastic connecting piece (2) is a ring-shaped metal sheet which can be elastically deformed.

8. The fixed vacuum capacitor with a short-circuit function according to claim 3, characterized by: The second electrode disc (4) is provided with a first screw hole (402) opposite to the driving end (102) in the radial direction, an adjusting screw (9) is installed in the first screw hole (402), and the adjusting screw (9) is used for pushing the driving end (102) to make the conductive rod (1) deviate, so that the contact end (101) abuts against the contact position (701).

9. The fixed vacuum capacitor with a short-circuit function according to claim 3, characterized by: Further comprising an eccentric screw (10), the eccentric screw (10) is provided with a screw rod part (1001) and a screw cone (1002) connected with the screw rod part (1001), the axis of the screw cone (1002) is eccentric with the axis of the screw rod part (1001); the second electrode disc (4) is provided with a second screw hole (403) in the axial direction on the side of the second mounting hole (401), the screw rod part (1001) is screwed into the second screw hole (403), and the screw cone (1002) is distributed on the side of the driving end (102); when the eccentric screw (10) rotates, the screw cone (1002) pushes the driving end (102), so that the conductive rod (1) deviates, and then the contact end (101) abuts against the contact position (701).

10. The fixed vacuum capacitor with a short-circuit function according to claim 1, characterized by: Further comprising a power driving device, the power driving device is used for automatically driving the conductive rod (1) to make a deviation movement in a set direction.

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