Vacuum capacitor with concentric system capable of being shortened

Abstract

The utility model discloses a vacuum capacitor with a concentric system capable of being shortened, and belongs to the technical field of vacuum capacitors. Comprising a shell which comprises a first conductor terminal, an insulating part and a second conductor terminal which are connected in sequence; an electrode assembly including a first electrode and a second electrode mounted within the case; the capacitance value adjusting assembly comprises a guide device and an adjusting bolt; the guide device comprises a guide rod mounted in the shell, and the adjusting bolt is connected with the first electrode through the guide rod; and a concentric assembly including a center piece on the second electrode and a recessed portion on the guide rod. According to the utility model, in the assembling process, the concentricity of the two electrodes meets the requirement through adaptive contact of parts in the capacitor, after assembling and sealing are completed, the two parts which are in contact with each other are separated from each other by using a tool externally, particles cannot be generated in the shell, and the cleanliness in the capacitor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum capacitors, and particularly relates to a vacuum capacitor with a concentric system that can be shortened Background Art

[0002] A vacuum capacitor includes two electrodes separated by a vacuum and usually a ceramic shell. A fixed vacuum capacitor has non-adjustable relative positions of the two electrodes, while an adjustable vacuum capacitor has adjustable relative positions of the two electrodes. During the assembly process, ensuring the concentricity of the two electrodes has always been a difficult point in this industry

[0003] Currently, two methods can be seen: one is to rely entirely on fixtures outside the capacitor body, and the other is to provide a metal tube in the middle of one electrode and a ceramic column in the middle of the other electrode. The concentricity of the two electrodes is ensured by the adaptation of the outer diameter of the ceramic column and the inner diameter of the metal tube

[0004] The disadvantage of the first method is that external tools often cannot achieve the required concentricity of the two electrodes; the second method is very suitable for fixed vacuum capacitors, but when used for adjustable vacuum capacitors, friction between the ceramic column and the metal tube easily generates fine particles, damaging the cleanliness inside the capacitor Content of the Utility Model

[0005] The purpose of the utility model is to provide an efficient vacuum capacitor with a concentric system that can be shortened, which can ensure the concentricity of the two electrodes

[0006] To solve the above technical problems, the utility model provides a vacuum capacitor with a concentric system that can be shortened, including

[0007] A housing, which includes a first conductor terminal, an insulating part, and a second conductor terminal connected in sequence

[0008] An electrode assembly, which includes a first electrode and a second electrode installed concentrically in the housing; the spiral or circular copper strips of the first electrode and the second electrode are inserted into each other, the first electrode is conducted with the first conductor terminal, and the second electrode is conducted with the second conductor terminal

[0009] A capacitance value adjusting assembly, which includes a guiding device and an adjusting bolt; the guiding device includes a guide rod installed in the housing, and the adjusting bolt is connected to the first electrode through the guide rod; the adjusting bolt is used to drive the first electrode to move, thereby adjusting the capacitance value

[0010] A concentricity assembly, which includes a central part located on the second electrode and a recessed part located on the guide rod, and the central part is adapted to the recessed part; the central part and the recessed part are used to ensure the concentricity of the first electrode and the second electrode

[0011] Preferably, the guiding device further includes a guide bushing installed in the housing;

[0012] The guide bushing is fixedly installed on the first conductor terminal, the guide rod is slidably arranged in the guide bushing, and the tail end of the guide rod passes through the middle part of the first electrode and is fixedly connected thereto;

[0013] The adjusting bolt passes through the first conductor terminal from the outside of the housing and is fixedly connected to the guide rod.

[0014] Preferably, the capacitance adjusting assembly further includes a capacitance upper cap and a driving nut;

[0015] The capacitance upper cap passes through the first conductor terminal and is fixed;

[0016] The driving nut is fixedly installed in the capacitance upper cap;

[0017] The adjusting bolt passes through the driving nut and is fixedly connected to the guide rod.

[0018] Preferably, the central member is formed by protruding from the middle part of the first electrode towards the second electrode side;

[0019] The recessed part is formed by inwardly recessing the middle part of the guide rod;

[0020] The central member includes a corrugated part and a central top, and the central top is adapted to the recessed part;

[0021] Internal threads are provided inside the central top, and a through hole is provided in the middle part of the second conductor terminal; an external tool passes through the through hole and is connected to the internal threads, so as to adjust the separation of the central top from the recessed part.

[0022] Preferably, the inner cavity of the housing is in a vacuum state and forms a vacuum dielectric.

[0023] Preferably, one end of the first electrode extends into the bellows;

[0024] The first electrode is electrically connected to the first conductor terminal through the bellows.

[0025] Preferably, the joints of the insulating parts with the first conductor terminal and the second conductor terminal are brazed.

[0026] Preferably, the central top and the recessed part are concentrically arranged.

[0027] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0028] During the assembly process of the utility model, the recessed parts at the top of the central part and the bottom of the pull rod are in contact and fit, enabling the concentricity of the first electrode and the second electrode to always meet the requirements. After brazing is completed and the inside of the capacitor is evacuated to a vacuum state, the central part, as part of the vacuum wall, is pulled short from the outside using external tools such as bolts, so that it is disengaged from the recessed part of the pull rod. The vacuum acts as an insulator to separate the first electrode and the second electrode, ensuring the concentricity of the two electrodes in the prepared vacuum capacitor.

[0029] During the assembly process of the utility model, the concentricity of the two electrodes meets the requirements through the fitting and contact of the parts inside the capacitor. After assembly and sealing are completed, tools are used externally to separate the two parts in contact, without generating particles inside the housing, ensuring the cleanliness inside the capacitor. Brief Description of the Drawings

[0030] The following further elaborates on the specific implementation manners of the utility model in conjunction with the drawings.

[0031] Figure 1 is a schematic structural diagram of a vacuum capacitor with a retractable concentric system of the utility model;

[0032] Figure 2 is a schematic structural diagram of the central part;

[0033] Figure 3 is a schematic structural diagram of the detachable cap nut and screw rod.

[0034] In the figure:

[0035] 1 - Vacuum capacitor; 2 - Housing; 3 - First conductor terminal; 4 - Second conductor terminal; 5 - Bellows; 6 - Guide rod; 61 - Recessed part; 7 - Guide sleeve; 8 - Insulating part; 9 - Central part; 91 - Central top; 92 - Corrugated part; 10 - Through hole; 11 - Internal thread; 12 - First electrode; 13 - Second electrode; 20 - Adjusting bolt; 21 - Driving nut; 23 - Cap of the capacitor. Specific Embodiment

[0036] Many specific details are set forth in the following description in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.

[0037] The terms used in one or more embodiments of this specification are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of this specification. The singular forms "a", "the", and "said" used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms first, second, etc. may be used in one or more embodiments of this specification to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0039] The following further describes the present utility model in detail in conjunction with the accompanying drawings:

[0040] The present utility model provides a vacuum capacitor with a concentric system that can be shortened, comprising:

[0041] A housing 2, which comprises a first conductor terminal 3, an insulating part 8, and a second conductor terminal 4 connected in sequence;

[0042] An electrode assembly, which comprises a first electrode 12 and a second electrode 13 that are concentrically arranged and installed in the housing 2; the helical or circular copper strips of the first electrode 12 and the second electrode 13 are inserted into each other, and the first electrode 12 is electrically connected to the first conductor terminal 3, and the second electrode 13 is electrically connected to the second conductor terminal 4;

[0043] A capacitance adjustment assembly, which comprises a guiding device and an adjustment bolt 20; the guiding device comprises a guide rod 6 installed in the housing 2, and the adjustment bolt 20 is connected to the first electrode 12 through the guide rod 6; the adjustment bolt 20 is used to drive the first electrode 12 to move so as to adjust the capacitance;

[0044] A concentric assembly, which comprises a central part 9 located on the second electrode 13 and a recessed part 61 located on the guide rod 6, and the central part 9 is adapted to the recessed part 61; the central part 9 and the recessed part 61 are used to ensure the concentricity of the first electrode 12 and the second electrode 13.

[0045] Preferably, the guiding device further comprises a guide sleeve 7 installed in the housing 2;

[0046] The said guide sleeve 7 is fixedly installed on the first conductor terminal 3. The guide rod 6 is slidably arranged inside the guide sleeve 7. The tail end of the guide rod 6 passes through the middle part of the first electrode 12 and is fixedly connected thereto.

[0047] The said adjusting bolt 20 passes through the first conductor terminal 3 from the outside of the housing 2 and is fixedly connected to the guide rod 6.

[0048] Preferably, the capacitance adjusting component further includes a capacitance upper cap 23 and a driving nut 21.

[0049] The capacitance upper cap 23 passes through the first conductor terminal 3 and is fixed.

[0050] The driving nut 21 is fixedly installed inside the capacitance upper cap 23.

[0051] The adjusting bolt 20 passes through the driving nut 21 and is fixedly connected to the guide rod 6.

[0052] Preferably, the central member 9 is formed by protruding from the middle part of the first electrode 12 towards the side of the second electrode 13.

[0053] The recessed part 61 is formed by inwardly recessing the middle part of the guide rod 6.

[0054] The central member 9 includes a corrugated part 92 and a central top 91. The central top 91 is adapted to the recessed part 61.

[0055] Internal threads 11 are provided on the inner side of the central top 91, and a through hole 10 is provided in the middle part of the second conductor terminal 4. An external tool passes through the through hole 10 and is connected to the internal threads 11, so as to adjust the separation of the central top 91 from the recessed part 61.

[0056] Preferably, the inner cavity of the housing 2 is in a vacuum state and forms a vacuum dielectric.

[0057] Preferably, one end of the first electrode 12 extends into the bellows 5.

[0058] The first electrode 12 is electrically connected to the first conductor terminal 3 through the bellows 5.

[0059] Preferably, the joints of the insulating part 8 with the first conductor terminal 3 and the second conductor terminal 4 are connected by soldering.

[0060] Preferably, the central top 91 and the recessed part 61 are concentrically arranged.

[0061] In order to better illustrate the technical effects of the present invention, the present invention provides the following specific embodiments to illustrate the above technical process:

[0062] Embodiment 1. A vacuum capacitor with a telescopable concentric system is applicable to fixed vacuum capacitors, especially to adjustable vacuum capacitors, such as Figure 1 As shown, this embodiment takes an adjustable vacuum capacitor as an example:

[0063] A vacuum capacitor 1 with a telescopable concentric system includes a housing 2 with a vacuum dielectric inside, a first electrode 12 and a second electrode 13 separated by the vacuum dielectric. The housing 2 includes a first conductor terminal 3 conductively connected to the variable first electrode 12 through a bellows 5 and a second conductor terminal 4 conductively connected to the fixed second electrode 13. The guiding device of the first electrode 12 includes a guide rod 6 sleeved in a guide sleeve 7. The first conductor terminal 3 and the second conductor terminal 4 are separated by an insulating part 8 of the housing 2.

[0064] The joints of the insulating part 8 with the first conductor terminal 3 and the second conductor terminal 4 are brazed connections to ensure the vacuum pumping effect.

[0065] A central part 9 made of metal is provided in the middle of the second electrode 13. As Figure 2 shown, the central part 9 is a cavity body with a corrugated outer wall that is closed at the top and open at the bottom. An internal thread 11 is provided on the inner wall of the central top 91; the second conductor terminal 4 is provided with a through hole 10;

[0066] In the middle of the first electrode 12, a recessed part 61 adapted to the central top 91 of the central part 9 is provided on the side close to the second electrode 13, and the bottom of the recessed part 61 is open.

[0067] During the assembly process, the central top 91 of the central part 9 contacts the recessed part 61 at the center of the bottom of the guide rod 6 of the first electrode 12. Due to the shape adaptation of the two, the variable first electrode 12 and the fixed second electrode 13 are concentric. After brazing and vacuum pumping of the entire housing 2 are completed, the central part 9 also becomes a part of the vacuum wall. An external tool (such as a bolt) adapted to the internal thread 11 is inserted through the through hole 10 and the bolt is turned to shorten the central part 9 so that it is separated from the variable first electrode 12. The vacuum acts as an insulator to separate the first electrode 12 and the second electrode 13.

[0068] As Figure 3 shown, the capacitor upper cap 23 supports an adjusting bolt 20 inside a drive nut 21. By turning the adjusting bolt 20, the variable first electrode 12 moves vertically to adjust the capacitance value.

[0069] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A vacuum capacitor with a concentric system that can be pulled shorter, characterized in that, Comprising: A housing (2) including a first conductor terminal (3), an insulating part (8), and a second conductor terminal (4) connected in sequence; An electrode assembly including a first electrode (12) and a second electrode (13) that are concentrically arranged and installed within the housing (2); the spiral or circular copper strips of the first electrode (12) and the second electrode (13) are inserted into each other, the first electrode (12) is electrically connected to the first conductor terminal (3), and the second electrode (13) is electrically connected to the second conductor terminal (4); A capacitance adjustment assembly including a guiding device and an adjustment bolt (20); the guiding device includes a guide rod (6) installed within the housing (2), and the adjustment bolt (20) is connected to the first electrode (12) through the guide rod (6); the adjustment bolt (20) is used to drive the first electrode (12) to move, thereby adjusting the capacitance; A concentricity assembly including a central part (9) located on the second electrode (13) and a recessed part (61) located on the guide rod (6), the central part (9) being adapted to the recessed part (61); the central part (9) and the recessed part (61) are used to ensure the concentricity of the first electrode (12) and the second electrode (13).

2. The vacuum capacitor with a concentric system that can be shortened according to claim 1, characterized in that: The guiding device further includes a guide sleeve (7) installed within the housing (2); The guide sleeve (7) is fixedly installed on the first conductor terminal (3), the guide rod (6) is slidably arranged within the guide sleeve (7), and the tail end of the guide rod (6) passes through the middle of the first electrode (12) and is fixedly connected thereto; The adjustment bolt (20) passes through the first conductor terminal (3) from the outside of the housing (2) and is fixedly connected to the guide rod (6).

3. The vacuum capacitor with a concentric system that can be shortened according to claim 2, characterized in that: The capacitance adjustment assembly further includes a capacitor upper cap (23) and a driving nut (21); The capacitor upper cap (23) passes through the first conductor terminal (3) and is fixed; The driving nut (21) is fixedly installed within the capacitor upper cap (23); The adjustment bolt (20) passes through the driving nut (21) and is fixedly connected to the guide rod (6).

4. The vacuum capacitor with a concentric system that can be shortened according to claim 3, characterized in that: The central part (9) is formed by protruding from the middle of the first electrode (12) towards the second electrode (13); The recessed part (61) is formed by inwardly recessing from the middle of the guide rod (6); The central part (9) includes a corrugated part (92) and a central top (91), and the central top (91) is adapted to the recessed part (61); An internal thread (11) is provided inside the central top (91), and a through hole (10) is provided in the middle of the second conductor terminal (4); an external tool passes through the through hole (10) and is connected to the internal thread (11), thereby adjusting the separation of the central top (91) from the recessed part (61).

5. The vacuum capacitor with a concentric system that can be shortened according to claim 4, characterized in that: The inner cavity of the housing (2) is in a vacuum state and forms a vacuum dielectric.

6. The vacuum capacitor with a retractable concentric system according to claim 5, characterized in that: One end of the first electrode (12) extends into the bellows (5); The first electrode (12) is electrically connected to the first conductor terminal (3) through the bellows (5).

7. The vacuum capacitor with a retractable concentric system according to claim 6, characterized in that: The connection between the insulating part (8) and the first conductor terminal (3) and the second conductor terminal (4) is a brazed connection.

8. The vacuum capacitor with a retractable concentric system according to claim 7, characterized in that: The central top (91) is concentrically arranged with the recessed part (61).

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