Aging device for high-voltage vacuum arc-extinguishing chamber product

Abstract

The utility model belongs to the field of test and detection of electric vacuum devices, and discloses an aging device for a high-voltage vacuum arc-extinguishing chamber product, which comprises a sealed cavity formed by connecting an upper composite insulator and a lower composite insulator, and can provide an aging environment for aging the vacuum arc-extinguishing chamber product; vacuum arc-extinguishing chamber products, namely voltage equalizing pieces at the top and the bottom of the vacuum arc-extinguishing chamber, and a shielding cylinder in the middle are respectively connected through one end of a high-voltage lead, and the other end of the high-voltage lead is connected with a high-voltage lead connector; the composite insulator at the bottom is also connected with a grounding lead; by the adoption of the structure, high voltage is directly applied to different shielding structures, the movable electrode and the static electrode are grounded, through strong spark discharge between the shielding structures and a main loop, burrs on the surfaces of the shielding structures are thoroughly removed, and the insulation margin of a product is improved; the aging effect is ensured to be consistent, and the overall insulation margin of the product is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of testing and inspection of vacuum electronic devices, and specifically relates to a aging device for a high-voltage vacuum interrupter product. Background Technology

[0002] The insulation capacity of vacuum interrupters is a key factor in ensuring the safe operation of power systems. Aging, as an important means to improve the insulation performance of interrupters, has formed a relatively mature process system in the 12-40.5kV medium and low voltage field, which can meet the insulation requirements of products.

[0003] For high-voltage vacuum interrupters, current aging process research is still in its early stages and a complete process system has not yet been formed. Especially for the unique multi-layered suspended shielding structure and voltage-equalizing components of high-voltage products, existing aging methods, such as voltage aging, specifically include small-distance and large-distance aging methods. Small-distance aging primarily aging the contact surface, while large-distance aging primarily aging the voltage-equalizing components such as the shielding cylinder. High-voltage vacuum interrupters are large in size and have high insulation requirements. To ensure a uniform internal electric field, multi-layered suspended shielding structures are often used, meaning multiple metal voltage-equalizing components inside the product balance the electric field. Currently, the aging process for high-voltage vacuum interrupters follows the methods used for medium and low-voltage products, which involves separating the moving and stationary contacts by a certain distance and applying high voltage to one end. Spark discharge is used to eliminate burrs on the metal surface. Small-distance aging primarily eliminates burrs on the contact surface, while large-distance aging primarily eliminates burrs on the shielding structure components, aiming to clean the component surfaces, eliminate surface burrs, and improve the product's insulation margin. However, using existing aging equipment, due to the large size of high-voltage products and their multi-layered suspended shielding structure, the different shielding structures are not at the same distance from the high voltage application position, resulting in different degrees of aging of the shielding structure under large opening distance, which in turn limits the overall improvement of the insulation margin of the vacuum interrupter.

[0004] Therefore, it can be seen that the existing aging measures have different degrees of aging due to the inconsistent distance between the shielding structure and the high voltage application position, resulting in different aging results under large opening distances, which affects the aging effect. Utility Model Content

[0005] This invention provides an aging device for high-voltage vacuum interrupter products to solve the technical problem that existing aging methods result in different degrees of aging of the shielding structure under large opening distances due to inconsistent distances between the shielding structure and the high-voltage application position, thus affecting the aging effect.

[0006] To achieve the above objectives, the present invention adopts the following technical content:

[0007] A aging device for a high-voltage vacuum interrupter product includes a first composite insulator and a second composite insulator;

[0008] The first composite insulator is connected to the second composite insulator to form a sealed chamber for providing aging space for the vacuum interrupter product;

[0009] A high-voltage lead connection port is provided at the bottom of the first composite insulator or at the top of the second composite insulator;

[0010] The high-voltage lead connector is connected to a high-voltage lead. One end of the high-voltage lead is connected to the high-voltage lead connector, and the other end is connected to the top equalizing component, the bottom equalizing component, and the shielding cylinder located in the middle of the vacuum interrupter.

[0011] The bottom of the second composite insulator is provided with a grounding lead.

[0012] Furthermore, the first composite insulator is provided with a first flange at its top; the second composite insulator is provided with a second flange at its bottom; and the second composite insulator is connected to the grounding lead.

[0013] Furthermore, a sealing ring is provided between the first composite insulator and the first flange.

[0014] Furthermore, a sealing ring is provided between the second composite insulator and the second flange.

[0015] Furthermore, an air inlet pipe is inserted into the first flange for evacuating the sealed chamber and filling it with insulating gas.

[0016] Furthermore, a stationary support is provided on the second flange, and the vacuum interrupter is connected to the stationary support during the aging process.

[0017] Furthermore, the first composite insulator and the second composite insulator are connected by bolts.

[0018] Furthermore, the high-voltage lead connection port adopts a threaded hole, which is opened on the bottom metal flange of the first composite insulator or on the top metal flange of the second composite insulator.

[0019] Furthermore, the high-voltage lead is disposed between the outer shell of the vacuum interrupter and the inner wall of the sealed cavity.

[0020] Furthermore, the high-voltage lead is made of hard round copper wire, one end of which is threaded to the high-voltage lead connector, and the other end is threaded to the top equalizing component, the bottom equalizing component, and the shielding cylinder located in the middle of the vacuum interrupter.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention provides an aging device for high-voltage vacuum interrupter products. The device includes a sealed chamber formed by two upper and lower composite insulators, providing an aging environment for the vacuum interrupter products. One end of a high-voltage lead connects the vacuum interrupter product, specifically the equalizing components at the top and bottom of the vacuum interrupter and the shielding cylinder in the middle, while the other end connects to the high-voltage lead connection port. A grounding lead is also connected to the bottom composite insulator. Using this structure, high voltage is directly applied to different shielding structures, while the moving and stationary electrodes are grounded. The strong spark discharge between the shielding structure and the main circuit thoroughly removes burrs from the shielding structure surface, improving the product's insulation margin. Furthermore, the different suspended shielding structures are connected in series via the high-voltage lead and are at the same potential, ensuring consistent aging effects and effectively improving the overall insulation margin of the product.

[0023] More preferably, in this invention, by providing a first flange on the top of the first composite insulator and a second flange on the bottom of the second composite insulator, the structural strength of the device is enhanced, and it is convenient to connect and fix it with other components; at the same time, the connection between the second flange and the grounding lead ensures the grounding safety of the device.

[0024] More preferably, in this invention, a sealing ring is provided between the first composite insulator and the first flange, which improves the sealing performance of the device, prevents gas leakage, ensures the vacuum degree and the stability of the insulating gas during the aging process, and thus guarantees the aging effect.

[0025] More preferably, in this invention, a sealing ring is provided between the second composite insulator and the second flange, which also improves the sealing performance of the device and ensures the stability of the aging environment.

[0026] More preferably, in this invention, an air inlet pipe is inserted into the first flange to facilitate evacuation and filling of the sealed chamber with insulating gas, thereby improving the aging effect of the vacuum interrupter product.

[0027] More preferably, in this invention, a static side support is provided on the second flange to provide stable support for the vacuum interrupter, ensuring stability and safety during the aging process.

[0028] Preferably, in this invention, the first composite insulator and the second composite insulator are connected by bolts, which simplifies the assembly process of the device and improves the reliability and stability of the connection.

[0029] Preferably, in this invention, the high-voltage lead connection port adopts a threaded hole design, which facilitates the installation and disassembly of the high-voltage lead and improves the flexibility and maintainability of the device.

[0030] Preferably, in this invention, the high-voltage lead is positioned between the outer shell of the vacuum interrupter and the inner wall of the sealed chamber, thus avoiding direct interference of high-voltage electricity with the internal structure of the vacuum interrupter and ensuring the accuracy and safety of the aging process.

[0031] Preferably, in this invention, the high-voltage lead is made of hard round copper wire and is connected to the high-voltage lead connection port and various key components of the vacuum interrupter through a threaded connection, ensuring the stable transmission of high-voltage electricity and the reliability of the connection; at the same time, the use of hard round copper wire also improves the durability and corrosion resistance of the high-voltage lead. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the aging device for a high-voltage vacuum interrupter product provided in an embodiment of the present invention.

[0033] Figure label:

[0034] 1. Air inlet pipe; 2. First flange; 3. Sealing ring; 4. First composite insulator; 5. Vacuum interrupter; 6. High-voltage lead connection port; 7. High-voltage lead; 8. Second composite insulator; 9. Static side support; 10. Second flange; 11. Grounding lead. Detailed Implementation

[0035] To make the technical problem solved by this utility model, the technical solution, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of this utility model. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] The present invention will now be described in further detail with reference to the accompanying drawings:

[0043] Example

[0044] As mentioned in the background technology, high-voltage products, in order to reduce product size and equalize internal field strength, mainly adopt a multi-layer floating shield structure, with the main shield cylinder exposed and multiple floating potentials. To ensure the product's insulation performance, the shield cylinder and equalizing components need to be aged to remove surface burrs and ensure the surface condition of the parts. However, existing aging devices for high-voltage arc-extinguishing chamber products have technical bottlenecks in removing surface burrs and ensuring the surface condition of the parts, and are limited by external insulation conditions, resulting in incomplete aging. Furthermore, existing aging devices suffer from inconsistent aging degrees of the shield structure under large opening distances due to the inconsistent distance between the shield structure and the high-voltage application position, which greatly affects the aging effect.

[0045] To address the aforementioned issues, this embodiment provides an aging device for high-voltage vacuum interrupter products. This device can age the floating potential of components such as shielding cylinders and equalizing parts of high-voltage products, thereby purifying the surface quality of parts, improving the insulation strength of products, and enhancing the stability and consistency of product aging.

[0046] like Figure 1 As shown, this embodiment provides an aging device for a high-voltage vacuum interrupter product. This aging device mainly consists of a first composite insulator 4 and a second composite insulator 8.

[0047] The first composite insulator 4 and the second composite insulator 8 both have through holes on the same side, and are tightly connected by inserting bolts to form a closed sealed chamber for accommodating and aging the vacuum interrupter product; wherein, the vacuum interrupter product includes the equalizing component (equalizing ring or equalizing cover) of the vacuum interrupter 5 and the shielding cylinder, and the vacuum interrupter product is the shielding structure of the vacuum interrupter 5.

[0048] Metal flanges are provided at the bottom of the first composite insulator 4 and at the top of the second composite insulator 8, and high-voltage lead connection ports 6 are opened on the metal flanges of the first composite insulator 4 or the second composite insulator 8.

[0049] One end of the high-voltage lead 7 is connected to the high-voltage lead connector 6, and the other end is connected to the top equalizing component, the bottom equalizing component, and the shielding cylinder in the middle of the vacuum interrupter 5. The high-voltage lead connector 6 adopts a threaded hole design to facilitate the installation and removal of the high-voltage lead 7.

[0050] The above design ensures that high voltage can be applied evenly to all critical parts of the vacuum interrupter.

[0051] In this embodiment, the bottom of the second composite insulator 8 is equipped with a grounding lead 11, forming a complete aging circuit.

[0052] In this embodiment, a first flange 2 and a second flange 10 are respectively installed on the top of the first composite insulator 4 and the bottom of the second composite insulator 8.

[0053] In addition, sealing rings 3 are installed between the flange and the insulator to enhance the sealing performance of the device.

[0054] In this embodiment, an air inlet pipe 1 is inserted into the first flange 2 for evacuating the sealed chamber and filling it with insulating gas.

[0055] A static side support 9 is provided on the second flange 10 to stably support the vacuum interrupter 5 during the aging process.

[0056] In this embodiment, the high-voltage lead 7 is placed between the outer shell of the vacuum interrupter 5 and the inner wall of the sealed cavity, which avoids direct interference of high voltage to the internal structure of the vacuum interrupter, thereby ensuring the insulation distance.

[0057] The high-voltage lead 7 is made of hard round copper wire. One end is connected to the high-voltage lead connection port 6 by a thread, and the other end is connected to each shielding structure of the vacuum interrupter 5 by a thread.

[0058] Therefore, this embodiment provides an aging device for high-voltage vacuum interrupter products, namely, a shielded structure aging scheme. The principle is as follows: high voltage is directly applied to different shielding structures, while the dynamic and static electrodes are grounded. Through the strong spark discharge between the shielding structure and the main circuit, the burrs on the surface of the shielding system are completely removed, improving the insulation margin of the product. Furthermore, different suspended shielding structures are connected in series through rigid wires and are at the same potential, ensuring consistent aging effect and effectively improving the overall insulation margin of the product.

[0059] This embodiment provides the following specific working principle:

[0060] This aging equipment is suitable for aging the shielding cylinder and equalizing components of high-voltage vacuum interrupter products, such as... Figure 1 As shown; firstly, the vacuum interrupter 5 to be aged and the vacuum interrupter product are fixed to the stationary side support 9 of the composite insulator. The flange of the stationary side support 9 has through holes to effectively position the product. A sealed chamber is formed by connecting the first composite insulator 4, the second composite insulator 8, the first flange 2, the second flange 10, and the sealing ring 3 with threads. The first composite insulator 4 and the second composite insulator 8 are designed and manufactured according to the product's aging voltage and insulation capacity composite test requirements. After evacuating the sealed chamber through the air inlet pipe 1, SF6 gas at a certain pressure is filled in to provide external insulation protection for the product's aging, ensuring that no external flashover occurs during the aging process of the product's shielding cylinder. The external shielding cover of the vacuum interrupter 5 has threaded holes on its equalizing component for connecting the high-voltage lead 7. The high-voltage lead 7 is a hard, round copper wire with threads processed at both ends. In the middle, the high-voltage output end is connected to the threaded hole of the external equalizing component and the shielding cylinder, and the high-voltage input end is connected to the threaded hole on the bottom metal flange of the composite insulator; the composite insulator metal flange is specially designed with threaded holes, which are the high-voltage lead connection port 6. The composite insulator metal flange here can be the bottom flange of the first composite insulator 4 or the top flange of the second composite insulator 8; multiple high-voltage leads 7 can be connected in series according to the number of external equalizing components of the product, and the floating potential is aged at the same time. The high-voltage lead 7 is positioned in the middle between the inner wall (sealed cavity) of the composite insulator and the vacuum interrupter 5 to ensure the insulation distance.

[0061] With the vacuum interrupter contacts closed, the high-voltage lead 7 of the equipment is connected to the high-voltage lead connection port 6 of the composite insulator flange, and the grounding lead 11 is connected to the second flange 10 of the second composite insulator 8, forming an aging circuit. During the aging process, the closed circuit formed by the moving and stationary conductive rods and contacts of the vacuum interrupter 5 is grounded, and the shielding cylinder and equalizing components are in the high-voltage section. By applying voltage, inter-electrode discharge is generated, achieving the aging effect of the shielding cylinder and equalizing components, and improving the insulation strength of the product.

[0062] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. A aging device for a high-voltage vacuum interrupter product, characterized in that, Including the first composite insulator (4) and the second composite insulator (8); The first composite insulator (4) is connected to the second composite insulator (8) to form a sealed chamber for providing aging space for the vacuum interrupter product; A high-voltage lead connection port (6) is provided at the bottom of the first composite insulator (4) or at the top of the second composite insulator (8). The high voltage lead connector (6) is connected to a high voltage lead (7). One end of the high voltage lead (7) is connected to the high voltage lead connector (6), and the other end is connected to the top equalizing component, the bottom equalizing component and the shielding cylinder located in the middle of the vacuum interrupter (5). The bottom of the second composite insulator (8) is provided with a grounding lead (11).

2. The aging device for the high-voltage vacuum interrupter product according to claim 1, characterized in that, The first composite insulator (4) is provided with a first flange (2) at its top; the second composite insulator (8) is provided with a second flange (10) at its bottom; the second composite insulator (10) is connected to the grounding lead (11).

3. The aging device for the high-voltage vacuum interrupter product according to claim 2, characterized in that, A sealing ring (3) is provided between the first composite insulator (4) and the first flange (2).

4. The aging device for the high-voltage vacuum interrupter product according to claim 2, characterized in that, A sealing ring (3) is provided between the second composite insulator (8) and the second flange (10).

5. The aging device for the high-voltage vacuum interrupter product according to claim 2, characterized in that, An air inlet pipe (1) is inserted into the first flange (2) for evacuating the sealed chamber and filling it with insulating gas.

6. The aging device for the high-voltage vacuum interrupter product according to claim 2, characterized in that, The second flange (10) is provided with a stationary side support (9). During the aging process, the vacuum interrupter (5) is connected to the stationary side support (9).

7. The aging device for the high-voltage vacuum interrupter product according to claim 1, characterized in that, The first composite insulator (4) and the second composite insulator (8) are connected by bolts.

8. The aging device for the high-voltage vacuum interrupter product according to claim 1, characterized in that, The high-voltage lead connection (6) adopts a threaded hole, which is opened on the bottom metal flange of the first composite insulator (4) or on the top metal flange of the second composite insulator (8).

9. The aging device for the high-voltage vacuum interrupter product according to claim 1, characterized in that, The high-voltage lead (7) is located between the outer shell of the vacuum interrupter (5) and the inner wall of the sealed cavity.

10. The aging device for the high-voltage vacuum interrupter product according to claim 1, characterized in that, The high-voltage lead (7) is made of hard round copper wire. One end is connected to the high-voltage lead connection port (6) by a thread, and the other end is connected to the top equalizing component, the bottom equalizing component and the shielding cylinder located in the middle of the vacuum interrupter (5) by a thread.

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