Fixed vacuum capacitor with shorting function

Abstract

The application discloses a fixed vacuum capacitor with a short circuit function, comprising a vacuum capacitor body, a movable conductive rod is arranged in the vacuum capacitor body, and the conductive rod is configured to connect two electrode groups of the vacuum capacitor body when the conductive rod is deflected in a set direction, so that the vacuum capacitor body is short-circuited. The application realizes short circuit by arranging the movable conductive rod in the vacuum capacitor body and connecting the two electrode groups when the conductive rod is deflected, so that the fixed vacuum capacitor has the short circuit function without changing the volume of the fixed vacuum capacitor. The design effectively solves the problem that the fixed vacuum capacitor needs to be removed to change the radio frequency matching circuit design in specific scenarios such as radio frequency matching device test, debugging, double-frequency and multi-frequency matching device design, greatly improves the operation convenience, meets the specific needs of users to quickly switch the working frequency and change the radio frequency matching circuit design, and improves the working efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of capacitors, in particular to a fixed vacuum capacitor with short-circuit function. BACKGROUND

[0002] A vacuum capacitor is a kind of capacitor with ceramic as the insulating shell, vacuum as the medium and high-conductivity oxygen-free copper as the electrode. The vacuum capacitor mainly has two types of variable vacuum capacitor and fixed vacuum capacitor. The capacitance of the variable vacuum capacitor is changed by adjusting the coupling length of the two electrode groups, while the electrode and capacitance of the fixed vacuum capacitor are fixed.

[0003] The traditional fixed vacuum capacitor has two electrode rings respectively welded on the upper and lower electrode discs, and the upper and lower electrode discs are welded on the two ends of the porcelain tube to form a vacuum chamber. The two electrode ring groups are sealed in the vacuum chamber and coupled with each other. Generally, the capacitance of the fixed vacuum capacitor is designed by adjusting the length, wall thickness, spacing of the electrode ring and the height of the porcelain tube according to the user's requirements. After the assembly and welding of each part are completed, the position of the electrode and the electrode disc of the fixed vacuum capacitor is fixed.

[0004] However, in some specific application scenarios, such as the test and debugging process of the radio frequency matcher and the design of the double-frequency and multi-frequency matcher, the user needs to disassemble the fixed vacuum capacitor to change the circuit design of the radio frequency matcher. This operation is not only cumbersome, but also affects the efficiency, and it is difficult to meet the specific needs of the user to quickly switch the working frequency and change the circuit design of the radio frequency matcher. Therefore, there is an urgent need for a fixed vacuum capacitor with short-circuit function to solve the above problems existing in the prior art. SUMMARY

[0005] The problem to be solved by the present application is to provide a fixed vacuum capacitor with short-circuit function to overcome the defect that the existing fixed vacuum capacitor cannot meet the specific needs of the user to quickly switch the working frequency and change the circuit design of the radio frequency matcher.

[0006] The technical scheme adopted by the present application to solve its technical problem is: a fixed vacuum capacitor with short-circuit function, comprising: a vacuum capacitor body, the vacuum capacitor body is internally provided with a movable conductive rod, the conductive rod is configured to connect two electrode groups of the vacuum capacitor body when it is deflected in a set direction to realize short-circuit of the vacuum capacitor body; wherein each of the two electrode groups comprises an electrode disc, the conductive rod is arranged between the two electrode discs, and the conductive rod is sealingly connected with one of the electrode discs through an elastic connecting piece, and the other electrode disc is provided with a contact part, the conductive rod can abut against the contact part when it is deflected in a set direction.

[0007] As a further improvement of the present application, the two electrode discs are respectively a first electrode disc and a second electrode disc, the second electrode disc is provided with a second mounting hole, the conductive rod is arranged in the second mounting hole and extends towards a vacuum chamber in the interior of the vacuum capacitor body, and the elastic connecting piece is sealingly connected between the conductive rod and the second electrode disc; the contact part is arranged on the first electrode disc.

[0008] As a further improvement of the present application, the conductive rod is provided with a contact end in the vacuum chamber and a driving end extending out of the vacuum chamber, the first electrode disc is provided with an insulating limiting piece, and the second electrode disc is provided with an elastic component always applying an elastic force to the driving end; in a non-short-circuit state, the conductive rod is caused to abut against the insulating limiting piece under the elastic force of the elastic component.

[0009] As a further improvement of the present application, the first electrode disc is provided with a first mounting hole, the insulating limiting piece is fixed in the first mounting hole, a conductive cover plate is sealingly fixed in the first mounting hole, and the contact part is integrally arranged on the conductive cover plate, with the contact end located between the contact part and the insulating limiting piece.

[0010] As a further improvement of the present application, the vacuum capacitor body comprises a porcelain tube sealingly connected between the two electrode discs and forming a closed vacuum chamber, and each of the two electrode groups further comprises an electrode ring group, the two electrode ring groups are fixed on the two electrode discs and are coupled to each other and arranged 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 application, in a non-short-circuit state, the distance between the conductive rod and the contact part is greater than the distance between the two electrode ring groups.

[0012] As a further improvement of the present application, the elastic connecting piece is a ring-shaped metal sheet capable of elastic deformation.

[0013] As a further improvement of the present application, the second electrode disc is provided with a first screw hole opposite to the driving end in the radial direction, and an adjusting screw is arranged in the first screw hole, the adjusting screw is used to push the driving end to cause the conductive rod to be deflected, so that the contact end abuts against the contact part.

[0014] As a further improvement of the present application, the fixed vacuum capacitor with short-circuit function further comprises an eccentric screw, the eccentric screw is provided with a screw rod part and a screw cone connected with the screw rod part, the axis of the screw cone is eccentric with the axis of the screw rod part; the second electrode disc is provided with a second screw hole along the axial direction at the side of the second mounting hole, the screw rod part is screwed into the second screw hole, and the screw cone is distributed at the side of the driving end; when the eccentric screw rotates, the screw cone pushes the driving end, so that the conductive rod is deflected, and the contact end abuts against the contact position.

[0015] As a further improvement of the present application, the fixed vacuum capacitor with short-circuit function further comprises a power driving device, the power driving device is used for automatically driving the conductive rod to make deflection movement in a set direction.

[0016] The present application has the advantages that: the present application provides a fixed vacuum capacitor with short-circuit function, through the built-in movable conductive rod, and the conductive rod can be deflected to realize short-circuit connection between two electrode groups, the fixed vacuum capacitor has the short-circuit function without changing the volume of the fixed vacuum capacitor, which effectively solves the cumbersome problem that the fixed vacuum capacitor needs to be removed to change the design of the radio frequency matching circuit in specific scenarios such as radio frequency matching circuit test, debugging, and double-frequency and multi-frequency matching circuit design, and greatly improves the operation convenience by realizing short-circuit through simple control of the deflection of the conductive rod, which meets the specific needs of users to quickly switch the working frequency and change the design of the radio frequency matching circuit, and improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 FIG. 1 is a perspective view of a fixed vacuum capacitor with short-circuit function according to an embodiment of the present application;

[0019] Figure 2 FIG. 2 is a sectional view of the fixed vacuum capacitor with short-circuit function according to the embodiment of the present application in a non-short-circuit state;

[0020] Figure 3 FIG. 3 is a perspective view of a conductive rod and an elastic connecting piece in the fixed vacuum capacitor with short-circuit function according to the embodiment of the present application;

[0021] Figure 4 FIG. 4 is a perspective view of a conductive cover plate in the fixed vacuum capacitor with short-circuit function according to the embodiment of the present application;

[0022] Figure 5 Figure 1 is a sectional view of the short-circuit state of the fixed vacuum capacitor with short-circuit function according to the present application;

[0023] Figure 6 Figure 2 is a perspective view of the fixed vacuum capacitor with short-circuit function according to the present application;

[0024] Figure 7 Figure 3 is a sectional view of the non-short-circuit state of the fixed vacuum capacitor with short-circuit function according to the present application;

[0025] Figure 8 Figure 4 is a perspective view of the eccentric screw in the fixed vacuum capacitor with short-circuit function according to the present application;

[0026] Figure 9 Figure 5 is a sectional view of the short-circuit state of the fixed vacuum capacitor with short-circuit function according to the present application;

[0027] The arrow direction in the figure indicates the deflection direction of the conductive rod. Figure 5 Figure 9 The arrow direction in the figure indicates the deflection direction of the conductive rod.

[0028] The following description is made in connection with the accompanying drawings:

[0029] 1, conductive rod; 101, contact end; 1011, flat surface; 102, driving end; 2, elastic connecting member; 3, first electrode disc; 301, first mounting hole; 4, second electrode disc; 401, second mounting hole; 402, first screw hole; 403, second screw hole; 404, mounting screw hole; 5, insulating limiting member; 6, elastic member; 7, conductive cover plate; 701, contact part; 8, porcelain tube; 9, adjusting screw; 10, eccentric screw; 1001, screw rod part; 1002, screw cone; 100, vacuum chamber; 11, first electrode ring group; 12, second electrode ring group. DETAILED DESCRIPTION

[0030] Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. The present application can be implemented or applied in other different specific embodiments, and the details in the present specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] ​It is to be understood that the embodiments described herein are for illustrative purposes and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application and scope of the appended claims. It is also to be understood that any one or more of the teachings, genes, compositions, example, embodiments, examples, or aspects described herein can be combined in any

[0032] It is also to be understood that the drawings provided herein are for illustrative purposes and that the actual implementation can vary in terms of shape, size, and arrangement of components, and that the layout of components can be more complex.

[0033] In addition, in the following description, specific details are provided to thoroughly understand examples. However, one of ordinary skill in the art will understand that the examples can be practiced without these specific details.

[0034] The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.

[0035] Embodiment one

[0036] Referring to Figures 1 to 5 The present application provides a fixed vacuum capacitor with short circuit function, comprising: a vacuum capacitor body, the vacuum capacitor body includes two electrode groups, and the vacuum capacitor body is internally provided with a movable conductive rod 1, the conductive rod 1 is configured to connect the 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.

[0037] The fixed vacuum capacitor with short circuit function of the present application realizes short circuit by internally providing a movable conductive rod 1, and the conductive rod 1 can connect the two electrode groups when it is deflected, so as to realize short circuit. Without changing the volume of the fixed vacuum capacitor, the fixed vacuum capacitor has the short circuit function. This design effectively solves the cumbersome problem that the fixed vacuum capacitor needs to be removed to change the design of the radio frequency matching circuit in specific scenarios such as radio frequency matching circuit test, debugging, and double-frequency and multi-frequency matching circuit design. By simply controlling the deflection of the conductive rod 1 to realize short circuit, the operation convenience is greatly improved, the specific needs of users to quickly switch the working frequency and change the design of the radio frequency matching circuit are met, and the working efficiency is improved.

[0038] Further, the vacuum capacitor body further comprises a porcelain tube 8, which is a tubular, preferably circular, open at both ends. The porcelain tube 8 is made of ceramic material, which has excellent insulation performance and high mechanical strength, helps to maintain the vacuum state inside the vacuum capacitor body, and ensures the safe and stable operation of the vacuum capacitor in a high-voltage environment.

[0039] Further, each of the two electrode groups comprises an electrode disc and an electrode ring group. In the embodiment, the two electrode discs are circular and adapted to the porcelain tube 8, and are respectively welded to the upper and lower ends of the porcelain tube 8, so as to form a sealed cavity inside the vacuum capacitor body, which is configured as the vacuum chamber 100. The two electrode ring groups are respectively welded to the end faces of the two electrode discs opposite to each other, and are coupled to each other and accommodated in the vacuum chamber 100.

[0040] As shown in Figure 2 the embodiment, each of the two electrode ring groups is formed by coaxially and spacedly sleeving a plurality of electrode rings with different diameters. The electrode rings of the two electrode ring groups are alternately arranged from inside to outside, and gaps are respectively left between adjacent two electrode rings. At the same time, the electrode rings of the two electrode ring groups at least partially extend into each other in the axial direction, and the relatively overlapped part is the coupling area of the two electrode ring groups.

[0041] In the present application, the conductive rod 1 is arranged between the two electrode discs and at the central position of the two electrode ring groups. The conductive rod 1 is sealingly connected to one of the electrode discs through the elastic connecting piece 2, and the other electrode disc is provided with a contact part 701. In the non-short-circuit state, the conductive rod 1 is distributed along the axial direction of the vacuum capacitor body, and there is a certain gap between the conductive rod 1 and the contact part 701. When the conductive rod 1 is deflected in a certain direction, it can abut against the contact part 701.

[0042] In the present application, the conductive rod 1 is sealingly connected to one of the electrode discs through the elastic connecting piece 2. This design not only ensures the mobility of the conductive rod 1, but also maintains the sealing performance of the vacuum chamber 100 inside the vacuum capacitor body, and ensures the stable operation of the vacuum capacitor under various working conditions.

[0043] For the convenience of distinguishing and understanding, the present application defines the two electrode discs as a first electrode disc 3 and a second electrode disc 4, and the two electrode ring groups as a first electrode ring group 11 and a second electrode ring group 12. As shown in Figure 2 the first electrode disc 3 is welded to the upper end of the porcelain tube 8, and the first electrode ring group 11 is welded to the bottom face of the first electrode disc 3. The second electrode disc 4 is welded to the lower end of the porcelain tube 8, and the second electrode ring group 12 is welded to the top face of the second electrode disc 4.

[0044] The second electrode disc 4 is provided with a second mounting hole 401 in the middle part, the conductive rod 1 is arranged in the second mounting hole 401 and extends towards the 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 part 701 is arranged on the first electrode disc 3.

[0045] Figure 3 Fig. 3 is an assembled view of the conductive rod 1 and the elastic connecting piece 2, the elastic connecting piece 2 is a high-temperature-resistant annular metal sheet capable of elastic deformation, for example, a molybdenum sheet, and the thickness is preferably less than or equal to 0.05 mm to ensure excellent elastic deformation capability. At the same time, the elastic connecting piece 2 can be silver-plated before assembly to ensure reliable welding and electrical conductivity.

[0046] Preferably, the second mounting hole 401 is provided with a step, the outer ring part of the elastic connecting piece 2 is welded to the step surface of the second mounting hole 401, and the inner ring part of the elastic connecting piece 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.

[0047] Referring to Figs. 1, 2 and 3, Figure 2 and Figure 3 the conductive rod 1 is provided with a contact end 101 (i.e. the upper end of the conductive rod 1) inside the vacuum chamber 100 and a driving end 102 (i.e. the lower end of the conductive rod 1) 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 always applying an elastic force to the driving end 102; in the non-short-circuit state, the conductive rod 1 is in abutment with the insulating limiting piece 5 under the elastic force of the elastic component 6, ensuring the stability of the position of the conductive rod 1 and avoiding the misoperation of the conductive rod 1 caused by external factors to connect the electrode group, thereby ensuring the stability and reliability of the vacuum capacitor during normal operation.

[0048] Exemplarily, the insulating limiting piece 5 can be an insulating rod made of ceramic material.

[0049] The conductive rod 1 can be made of a metal round bar with certain mechanical strength. Preferably, the contact end 101 of the conductive rod 1 is processed into a flat shape, i.e. the two side surfaces thereof facing the contact part 701 and the insulating limiting piece 5 are both processed into flat surfaces 1011 to increase the contact area with the contact part 701 and the insulating limiting piece 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 component 6 and the adjusting screw 9; in addition, the surface of the conductive rod 1 can also be silver-plated before assembly to ensure the welding performance and electrical conductivity.

[0050] Referring to Figs. 1, 2 and 3, Figure 2 and Figure 4The middle part of the first electrode disc 3 is provided with a first mounting hole 301, and the insulating limiting part 5 is welded in the first mounting hole 301 along the horizontal direction. The contact end 101 of the conductive rod 1 is inserted into the first mounting hole 301 and abuts against the insulating limiting part 5. Meanwhile, the conductive cover plate 7 is fixed in the first mounting hole 301, and the conductive cover plate 7 and the first electrode disc 3 are connected in a sealed mode by welding, so as to ensure the sealing of the vacuum chamber 100.

[0051] As shown in Figure 4 , the bottom of the conductive cover plate 7 integrally extends a protrusion downward, and the protrusion is the contact part 701 described above. The contact end 101 of the conductive rod 1 is movably arranged between the contact part 701 and the insulating limiting part 5.

[0052] The conductive cover plate 7 can be made of a metal round bar, and the contact part 701 is processed with a vertical surface parallel to the axis of the vacuum capacitor body. When assembled, the vertical surface of the contact part 701 needs to be parallel to the plane 1011 of the conductive rod 1.

[0053] 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 surface) is greater than the distance between the electrode rings of the first electrode ring group 11 and the second electrode ring group 12, so as to ensure the voltage resistance of the vacuum capacitor.

[0054] In the present application, the elastic component 6 can be, but is not limited to, a spring or a tension spring.

[0055] As shown in Figure 1 , the elastic component 6 is a spring, one end of the spring elastically abuts against the circular groove peripheral wall of the second electrode disc 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 contact end 101 abuts against the insulating limiting part 5 under the elastic force of the elastic component 6, so as to ensure the stable position of the conductive rod 1.

[0056] Of course, in other embodiments of the present application, the elastic component 6 can be a tension spring, one end of the tension spring is connected to the second electrode disc 4, and the other end of the tension spring is connected to the driving end 102 of the conductive rod 1. The tension spring exerts a pulling force on the driving end 102 in the same direction as the spring exerts the elastic force on the driving end 102, and the contact end 101 can also abut against the insulating limiting part 5 in the non-short circuit state, and the same technical effect can be achieved.

[0057] In addition, the fixed vacuum capacitor with a short circuit function of the present application also comprises an adjusting screw 9. In the present embodiment, the adjusting screw 9 is manually adjusted to push the conductive rod 1 to make a deflection movement.

[0058] As shown in 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.

[0059] 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.

[0060] 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.

[0061] Example 2

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] As can be seen, when the short-circuit function needs to be implemented, the conductive rod 1 is pushed to swing by operating the eccentric screw 10, and then the two electrode discs are connected, which makes the short-circuit operation simple and reliable, easy to implement, and meets the specific needs of users to quickly switch the working frequency and change the design of the radio frequency matching circuit.

[0067] In order to facilitate the rotation of the eccentric screw 10, a T-shaped groove or a cross-shaped groove can be arranged on the end face of the screw circular table 1002, so that a screwdriver or the like can be inserted into the groove to rotate the eccentric screw 10, thereby driving the conductive rod 1 to swing.

[0068] Embodiment Three

[0069] In the above-mentioned embodiment one and embodiment two, the implementation of the short-circuit function of the vacuum capacitor is controlled by a manual mode. Therefore, the present application also provides the present embodiment three, which aims to replace the manual mode in the embodiment one and embodiment two with an automatic mode to realize the short-circuit control.

[0070] In the present embodiment, the fixed vacuum capacitor with a short-circuit function further comprises a power driving device, which is used to automatically drive the conductive rod 1 to swing in a set direction.

[0071] For example, the power driving device can be an electromagnetic mechanism arranged on the side of the driving end 102 of the conductive rod 1. When the electromagnetic mechanism is powered on, it can generate a magnetic attraction force on the driving end 102, so that the driving end 102 is adsorbed on the electromagnetic mechanism and tilts, thereby causing the conductive rod 1 to swing around the elastic connecting piece 2 as a fulcrum until the contact end 101 abuts against the contact position 701, and then the short circuit of the vacuum capacitor body is realized.

[0072] For another example, the power driving device can be a micro electric push rod, which replaces the adjusting screw 9 in the embodiment one. When the micro electric push rod is extended, it pushes the driving end 102 to tilt, thereby causing the conductive rod to swing until the contact end 101 abuts against the contact position 701, and then the short circuit of the vacuum capacitor body is realized.

[0073] As can be seen, when the short-circuit function needs to be implemented, the conductive rod 1 is automatically driven by the power driving device to swing to short-circuit the vacuum capacitor, without manual operation, which further improves the efficiency, makes the capacitor adapt to more automatic application scenarios, further improves its applicability in different working environments, and widens the application range of the product.

[0074] In the present specification, the same and similar parts among various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0075] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection 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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