Outdoor permanent magnet vacuum circuit breaker pole

Abstract

This utility model relates to an outdoor permanent magnet vacuum circuit breaker pole, belonging to the technical field of circuit breaker pole technology. It aims to solve the problem of easy degradation of insulation performance of existing poles at high temperatures. The key technical points are: an integrally formed square mounting base at the bottom of the pole body, with a sealing ring on the outer wall and a raised ring on the inner wall of the sealing ring; a groove on the lower edge of the outer wall of the square mounting base, the two fitting together to enhance sealing; a threaded hole at the top of the pole body connects to a screw rod, with an L-shaped terminal block fitted on the screw rod and locked with two nuts to achieve a stable electrical connection; a cover is provided over the screw rod, with a notch for the L-shaped terminal block to pass through; a positioning insert is located on the top of the inner wall of the cover; and a mating slot is located on the top of the screw rod for easy installation and fixing; the reinforcing matrix is ​​made of glass fiber reinforced nylon composite material, and the surface is covered with a nano-composite coating of epoxy resin with added alumina nanoparticles, improving insulation and heat resistance, and extending the service life of the circuit breaker.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker pole technology, and in particular relates to the pole of outdoor permanent magnet vacuum circuit breaker. Background Technology

[0002] As the core component of the circuit breaker, the pole of the outdoor permanent magnet vacuum circuit breaker undertakes key functions such as electrical connection, insulation support and arc extinguishing. Its performance plays a decisive role in the reliability, safety and service life of the circuit breaker.

[0003] Currently, epoxy resin sealing structures are commonly used in pole insulation systems. However, in actual use, when the pole is subjected to long-term thermal stress (≥120℃), the epoxy resin will undergo thermo-oxidative aging, specifically manifested as molecular chain breakage and reduced cross-linking density. This aging process accelerates the degradation of the pole's insulation performance in high-temperature environments, thereby affecting the normal operation of the circuit breaker, increasing the risk of failure, reducing the circuit breaker's applicability in harsh environments such as high temperatures, shortening its service life, and making it difficult to meet the requirements of some application scenarios with high insulation and heat resistance requirements. Utility Model Content

[0004] The purpose of this invention is to provide an outdoor permanent magnet vacuum circuit breaker pole, which solves the technical problem that when the pole is under long-term thermal stress (≥120℃), the epoxy resin will exhibit thermal-oxidative aging, specifically manifested as molecular chain breakage and reduced cross-linking density. This aging process accelerates the degradation of the pole's insulation performance in high-temperature scenarios, thereby affecting the normal operation of the circuit breaker and increasing the risk of failure.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] Outdoor permanent magnet vacuum circuit breaker poles, including:

[0007] The electrode body has a square mounting base integrally formed at the bottom. A sealing ring is provided on the outer wall of the square mounting base. A screw is threadedly connected to the threaded hole at the top of the electrode body. An L-shaped terminal block is fitted on the screw. A cover is provided on the outside of the screw. The cover has a notch for the L-shaped terminal block to pass through. The reinforcing base surface of the electrode body is uniformly covered with a protective coating.

[0008] Optionally, the inner wall of the sealing ring is integrally formed with a raised ring, and the lower edge of the outer wall of the square mounting base is provided with a groove for embedding the raised ring.

[0009] Optionally, the screw is threaded with two nuts for locking the L-shaped terminal block, the L-shaped terminal block being located between the two nuts.

[0010] Optionally, a positioning rod is fixedly provided on the top of the inner wall of the housing, and a mating slot for inserting the bottom end of the positioning rod is provided on the top of the screw.

[0011] Optionally, the reinforcing matrix is ​​made of glass fiber reinforced nylon composite material.

[0012] Optionally, the protective coating is a nanocomposite coating in which alumina nanoparticles are added to epoxy resin.

[0013] The embodiments of this utility model have the following beneficial effects:

[0014] In this invention, the reinforcing matrix is ​​made of glass fiber reinforced nylon composite material, which ensures the structural strength of the pole while reducing its weight, facilitating installation and transportation, and lowering production costs. The protective coating is a nanocomposite coating made by adding alumina nanoparticles to epoxy resin, significantly improving the insulation and heat resistance of the pole. Compared with traditional epoxy resin-sealed poles, this nanocomposite coating effectively resists high-temperature thermo-oxidative aging, slows down the rate of insulation degradation, and allows the circuit breaker to maintain good insulation performance even in high-temperature environments, greatly extending its service life and improving its applicability and reliability in harsh environments.

[0015] The use of the square mounting base and sealing ring in this invention greatly enhances the sealing performance of the pole mounting part through the fitting of the convex ring and the groove, effectively preventing the intrusion of external impurities, reducing the risk of electrical faults caused by impurities, and improving the reliability and safety of the circuit breaker.

[0016] In this invention, the combination of screw, nut and L-shaped terminal block makes the electrical connection more stable and reliable. The two nuts locking the L-shaped terminal block ensures the tightness of the electrical connection, reduces contact resistance, reduces heat generation, improves electrical transmission efficiency, and also enhances the stability of the connection, reducing failures caused by loose connections.

[0017] The cover in this invention reduces the interference of external factors on the electrical connection parts, and the cooperation between the positioning rod and the docking slot facilitates the installation and fixing of the cover.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0021] Figure 2 This is a disassembly diagram of an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the screw and the casing structure in cross-section according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the planar structure of the pole body in a partial cross-sectional view according to an embodiment of the present invention.

[0024] In the diagram: 1. Pole post body; 2. Square mounting base; 3. Sealing ring; 4. Raised ring; 5. Groove; 6. Threaded hole; 7. Screw; 8. Nut; 9. L-shaped terminal block; 10. Cover; 11. Positioning rod; 12. Connecting slot; 13. Reinforcing base; 14. Protective coating; 15. Notch. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0028] Example:

[0029] Please refer to Figure 1-4 Outdoor permanent magnet vacuum circuit breaker poles, including:

[0030] The pole body 1 serves as the main structure of the entire pole. Its bottom is integrally formed with a square mounting base 2. A sealing ring 3 is set on the outer wall of the square mounting base 2. A raised ring 4 is integrally formed on the inner wall of the sealing ring 3. A groove 5 for embedding the raised ring 4 is provided on the lower edge of the outer wall of the square mounting base 2. During the assembly process, the sealing ring 3 is first put on the outer wall of the square mounting base 2, and the raised ring 4 of the sealing ring 3 is ensured to be accurately embedded in the groove 5 of the square mounting base 2. Through this interlocking use of the raised ring 4 and the groove 5, the sealing performance of the pole mounting part can be greatly enhanced. When the pole is installed in the corresponding position, the combination of the square mounting base 2 and the sealing ring 3 can achieve a tight fit with the mounting part, effectively preventing external dust, moisture and other impurities from entering the pole, thereby ensuring the safe and stable operation of the internal electrical components.

[0031] The top of the pole body 1 is provided with a threaded hole 6. The screw 7 is threaded into the threaded hole 6. Then, the L-shaped terminal block 9 is fitted onto the screw 7. To ensure a stable connection of the L-shaped terminal block 9, two nuts 8 are threaded onto the screw 7, so that the L-shaped terminal block 9 is located between the two nuts 8. By tightening the two nuts 8, the L-shaped terminal block 9 is firmly fixed to the screw 7, realizing the electrical connection function. This method of locking the L-shaped terminal block 9 with two nuts 8 can ensure the tightness of the electrical connection, reduce contact resistance, reduce heat generation, improve electrical transmission efficiency, and at the same time enhance the stability of the connection, effectively reducing failures caused by loose connections.

[0032] The screw 7 is covered by a cover 10, which has a notch 15 for the L-shaped connector 9 to pass through. The L-shaped connector 9 is passed through the notch 15 so that the cover 10 can smoothly cover the screw 7. A positioning rod 11 is fixedly installed on the top of the inner wall of the cover 10. The top of the screw 7 is provided with a docking slot 12 for inserting the bottom end of the positioning rod 11. When installing the cover 10, the positioning rod 11 is accurately inserted into the docking slot 12 to ensure that the cover 10 is installed firmly. The cover 10 can provide good protection for the screw 7 and reduce interference from external factors. The use of the positioning rod 11 and the docking slot 12 facilitates the installation and fixation of the cover 10.

[0033] The electrode body 1 has a reinforcing matrix 13, which is made of glass fiber reinforced nylon composite material. When preparing the reinforcing matrix 13, glass fiber and nylon material are mixed evenly in a certain proportion and formed by injection molding and other processes. The reinforcing matrix 13 prepared in this way has both the toughness of nylon and the high strength of glass fiber. While ensuring the structural strength of the electrode, the weight of the electrode is reduced, making it easier to install and transport, and also reducing production costs.

[0034] A protective coating 14 is uniformly covered on the surface of the reinforcing substrate 13. The protective coating 14 is a nanocomposite coating made by adding alumina nanoparticles to epoxy resin. In preparing the protective coating 14, epoxy resin is first mixed with an appropriate amount of solvent and stirred evenly. Then, alumina nanoparticles are added and stirred continuously to make the alumina nanoparticles uniformly dispersed in the epoxy resin. Next, the mixed coating is uniformly coated on the surface of the reinforcing substrate 13 by spraying, brushing, or other methods. After curing and other processes, the protective coating 14 is formed. The addition of alumina nanoparticles can fill the gaps between epoxy resin molecules, enhance the density of the coating, and improve the insulation and heat resistance of the coating. In high-temperature environments, the nanocomposite coating 14 can effectively resist thermo-oxidative aging, slow down the rate of molecular chain breakage and cross-linking density decrease, thereby maintaining the insulation performance of the pole and ensuring the reliable operation of the circuit breaker in high-temperature scenarios.

[0035] This application can be used for circuit breaker poles, or in other fields applicable to this application.

[0036] It should be noted that in the description of this specification, descriptions such as "first" and "second" are only used to distinguish the features and do not have any actual order or directional meaning. This application is not limited to this.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An outdoor permanent-magnet vacuum circuit breaker pole, characterized by, include: The pole body (1) has a square mounting base (2) integrally formed at the bottom. A sealing ring (3) is provided on the outer wall of the square mounting base (2). A screw (7) is threadedly connected to the threaded hole (6) at the top of the pole body (1). An L-shaped terminal block (9) is fitted on the screw (7). A cover (10) is provided on the outside of the screw (7). A notch (15) is provided on the cover (10) for the L-shaped terminal block (9) to pass through. A protective coating (14) is uniformly covered on the surface of the reinforcing base (13) of the pole body (1).

2. The outdoor permanent-magnet vacuum circuit breaker pole according to claim 1, characterized in that The inner wall of the sealing ring (3) is integrally formed with a convex ring (4), and the lower edge of the outer wall of the square mounting base (2) is provided with a groove (5) for embedding the convex ring (4).

3. The outdoor permanent magnet vacuum circuit breaker pole as described in claim 1, characterized in that, The screw (7) is threaded with two nuts (8) for locking the L-shaped terminal block (9), and the L-shaped terminal block (9) is located between the two nuts (8).

4. The outdoor permanent-magnet vacuum circuit-breaker pole according to claim 1, characterized in that A positioning rod (11) is fixedly provided on the top of the inner wall of the cover (10), and a docking slot (12) for inserting the bottom end of the positioning rod (11) is provided on the top of the screw (7).

5. The outdoor permanent-magnet vacuum circuit-breaker pole according to claim 1, characterized in that The reinforcing matrix (13) is made of glass fiber reinforced nylon composite material.

6. The outdoor permanent-magnet vacuum circuit-breaker pole according to claim 1, characterized in that The protective coating (14) is a nanocomposite coating with alumina nanoparticles added to epoxy resin.

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