A circuit breaker with fully insulated disconnecting device

Abstract

The utility model provides a kind of circuit breaker with full insulation separation connecting device, the pole column of this circuit breaker sets in line, out line connector, each connector is covered with elastic insulating cover, and the insulating cover is tightly covered connector by elastic deformation, forms sealed insulation barrier, while maintaining the compact layout of equipment, substantially increase the creepage distance, effectively resist the creeping phenomenon under humid environment, meet the insulation requirement of high voltage grade equipment, significantly improve the operation safety of circuit breaker under complex working conditions. At the same time, the annular recess of the outer periphery of the root of the insulating cover and the connector is designed with clamping cooperation, to realize standardization, tight connection, compared with traditional manual installation of insulation components, significantly improve the assembly efficiency and insulation structure stability.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a circuit breaker with a fully insulated disconnection device. Background Technology

[0002] The main components inside the switchgear include vacuum circuit breakers and other electrical components such as disconnecting switches, instrument transformers, and grounding switches, used to conduct current and realize the opening and closing of circuits. The pole structure of the internal vacuum circuit breaker directly affects the operational safety of the system. It includes an incoming terminal and an outgoing terminal, with the incoming terminal connecting to the disconnecting switch and the outgoing terminal connecting to the instrument transformer. With the development of the power industry, the compactness of switchgear equipment has become an important development trend, especially under the trend of compact design for high-voltage level switchgear such as 24kV, according to the mandatory requirements for electrical clearances and creepage distances in IEC 62271-200 (GB 3906) standards. However, traditional designs struggle to balance the contradiction between equipment miniaturization and insulation safety. In the process of compact design, to reduce equipment size, the actual distance between each live part (pole) is often forced to be shortened, making it difficult to meet the creepage distance standard requirements. When the distance between live parts is reduced, creepage discharge along the insulation surface is easily triggered in humid environments, threatening equipment safety. Existing solutions rely on manually adding non-standard insulation measures such as partitions or heat-shrink tubing between live parts to enhance insulation and resolve this contradiction. However, such solutions have many drawbacks. On the one hand, the lack of standardized forms for these insulation structures leads to non-standard products; on the other hand, the stability of manual processes is poor, and the service life of insulating components is limited, making it difficult to meet the requirements for long-term stable operation. Therefore, there is an urgent need for a new type of connection device that can effectively solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a circuit breaker with a fully insulated separation connection device. Through a standardized and highly reliable insulation structure, it strictly guarantees the requirements of electrical clearance and creepage distance, thereby improving the insulation performance and operational safety of the circuit breaker under complex operating conditions.

[0004] The technical solution of this utility model is as follows: A circuit breaker with a fully insulated separation connection device includes a pole post, wherein the pole post is provided with an inlet connector and an outlet connector, each connector is provided with a plug interface for inserting a conductive sheet, the root of which is connected to the pole post, and each connector is fitted with an elastic insulating cover, the connector being spherical or cylindrical, and having an annular recess on the outer periphery of its root, the elastic insulating cover being adapted to cover the outside of the corresponding connector to form insulation and forming a snap-fit ​​engagement with the annular recess.

[0005] By adopting the above technical solution, this utility model significantly improves the safety and reliability of the equipment by designing a circuit breaker with a fully insulated separation connection device. Specifically, the circuit breaker cleverly incorporates inlet and outlet connectors on its poles, with an elastic insulating cover fitted onto each connector. This insulating cover adapts to and covers the outside of the connector through elastic deformation, forming a sealed insulating barrier. Without altering the compact layout of the equipment, the creepage distance can be significantly increased, meeting the insulation requirements of high-voltage equipment and effectively preventing creepage in humid environments. This significantly improves the insulation performance and operational safety of the circuit breaker under complex operating conditions.

[0006] Furthermore, the insulating cover and the annular recess on the outer periphery of the joint root form a clever snap-fit, achieving a standardized and tight connection between the insulating cover and the joint. Compared with the traditional method of manually adding insulating components, this significantly improves assembly efficiency and insulation structure stability, thereby ensuring the stability and durability of the insulation and providing a strong guarantee for the long-term stable operation of power equipment.

[0007] A further feature of this invention is that the root of the ball-shaped connector is narrowed to form the annular recess; the portion of the elastic insulating cover that fits into the ball-shaped connector has a spherical cover structure, and its edge is embedded in the annular recess to form a snap-fit.

[0008] With the above-mentioned further design, the ball-shaped connector features a reduced-diameter annular recessed area. The curved surface structure of the ball naturally guides the installation of the insulating cover, reducing assembly difficulty. The elastic insulating cover of the ball structure fits the connector surface, enhancing the insulating cover's resistance to detachment under vibration and effectively preventing the electric arc from spreading along the connector surface, further optimizing the creepage path.

[0009] A further feature of this invention is that at least one annular recess is provided on the outer periphery of the root of the cylindrical connector; the portion of the elastic insulating cover that adapts to the cylindrical connector has a cylindrical structure, and a protruding ring is provided on its inner ring to engage with the annular recess.

[0010] With the above-mentioned further design, the annular concave area and convex ring of the cylindrical connector are designed to fit together to form a sealed snap-fit ​​structure, which significantly improves the pull-out resistance and waterproof and dustproof capabilities of the insulation cover. Even under long-term thermal expansion and contraction or mechanical vibration, it can still maintain a stable sealing state, ensuring that the insulation performance of the connector is not affected by environmental factors and meeting the stringent requirements of high-voltage equipment for insulation reliability.

[0011] A further feature of this invention is that the head of the cylindrical connector has a spherical structure.

[0012] By adopting the above-mentioned further design, the head of the cylindrical connector is designed as a spherical surface, and the spherical structure naturally guides the installation of the insulating cover, reducing the assembly difficulty.

[0013] A further feature of this invention is that the elastic insulating cover on the inlet connector has a covering shell at one end and a connecting component at the other end. The covering shell is adapted to fit the inlet connector of the pole, and the connecting component is used to fit with the connector of the electrical component. The elastic insulating cover completely encloses the corresponding conductive sheet.

[0014] With the further configuration described above, one end of the elastic insulating cover is connected to the inlet connector of the pole via a covering shell, and the other end is connected to external electrical components such as disconnect switches via connecting parts for quick and reliable connection. The corresponding conductive sheet is completely enclosed within this design, thus forming a fully enclosed insulating space. This design completely eliminates the potential leakage hazard caused by exposed conductive sheets, greatly improving the safety of the electrical system.

[0015] A further feature of this invention is that the elastic insulating cover is provided with a conduit for the conductive sheet to pass through.

[0016] By adopting the above-mentioned further settings, the conductive sheet is also included in the insulation protection range, which enhances the insulation effect and ensures the integrity and standardization of the insulation structure.

[0017] A further feature of this invention is that the elastic insulating cover is integrally molded from soft silicone rubber material.

[0018] By adopting the above-mentioned further design, the one-piece molding process eliminates the splicing gaps between components, avoiding the problems of moisture intrusion and reduced insulation performance caused by gaps; the elastic properties of the soft silicone rubber material enable the insulation cover to adapt to the small deformation of the joint, maintain good sealing performance under thermal expansion and contraction or mechanical vibration environment, and significantly improve the environmental adaptability and service life of the insulation structure.

[0019] A further feature of this invention is that the conductive sheet is fastened to the connector by screws, thereby achieving electrical connection. The screws are screwed into the connector and covered by the elastic insulating cover.

[0020] By employing the aforementioned further design, the screw fastening structure is completely incorporated into the protective range of the insulating cover, avoiding partial discharge and corrosion problems caused by exposed screws and improving the insulation safety of the connection points. Simultaneously, this design standardizes the fastening method of the conductive sheet, reducing the risk of poor contact due to improper manual operation and ensuring the reliability and stability of the electrical connection.

[0021] A further feature of this invention is that the connector head has a screw hole that is perpendicular to the insertion interface, the screw passes through the screw hole and fastens the conductive piece inside the insertion interface to the connector; or the insertion interface of the connector head extends to one side to form an open lateral port, the screw passes through the lateral port and fastens the conductive piece to the connector.

[0022] With the aforementioned further modifications, the two screw-fastening structures are suitable for different installation spaces and operational requirements. The vertically penetrating screw hole design facilitates fastening operations from the side of the connector, making it suitable for installation environments with ample space; the open design of the side port allows for quick installation and removal of the conductive sheet in limited spaces, improving assembly efficiency. Regardless of the structure, the integrity of the insulating cover is not compromised during screw fastening, ensuring the insulation performance of the connection points.

[0023] A further feature of this invention is that the pole is a vertical column, the inlet connector is located at the upper end of the pole, and the outlet connector is located on the side wall of the pole; and the plug-in interface is provided at the upper end of the inlet connector and the outlet connector.

[0024] By adopting the above-mentioned further design, the vertical pole combined with the plug interface design with the opening at the top of the connector optimizes the internal spatial layout of the switch cabinet, making the electrical connection of the incoming and outgoing lines more compact and orderly. Attached Figure Description

[0025] Figure 1 This is a structural diagram of a specific embodiment of the present utility model;

[0026] Figure 2 This is a structural diagram of the pole with a cylindrical connector in specific embodiment 1 of this utility model;

[0027] Figure 3 for Figure 2 The structural diagram of the incoming line connector;

[0028] Figure 4 To adapt to Figure 3 Schematic diagram of the elastic insulating cover structure of the incoming line connector;

[0029] Figure 5 for Figure 3 The diagram shows the structure of the outgoing connector.

[0030] Figure 6 To adapt to Figure 5 Schematic diagram of the elastic insulating cover structure of the outgoing connector;

[0031] Figure 7 This is a structural diagram of the pole post with a ball-shaped connector in specific embodiment 2 of this utility model;

[0032] Figure 8 for Figure 7 The structural diagram of the incoming line connector;

[0033] Figure 9 for Figure 7 The diagram shows the structure of the outgoing connector.

[0034] Figure 10This is an assembly diagram of multiple pole posts in a specific embodiment of this utility model.

[0035] In the diagram: pole post 1, inlet connector 11, outlet connector 12, plug interface 13, annular recess 14, screw hole 15, elastic insulating cover 3, covering shell 32, conduit 33, connecting component 34, protruding ring 31, conductive sheet 2. Detailed Implementation

[0036] The technical solutions in this embodiment 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. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] like Figure 1-10 As shown, this utility model discloses a circuit breaker with a fully insulated separation connection device, including a pole 1. The pole 1 is provided with an inlet connector 11 and an outlet connector 12. Each connector is provided with a plug-in interface 13 for inserting a conductive sheet 2, the root of which is connected to the pole 1. Each connector is fitted with an elastic insulating cover 3. The connector is spherical or cylindrical, and an annular recess 14 is provided on the outer periphery of its root. The elastic insulating cover 3 is adapted to cover the outside of the corresponding connector to form insulation and forms a snap-fit ​​engagement with the annular recess 14. The elastic insulating cover 3 on the inlet connector 11 has a covering shell 32 at one end and a connecting component 34 at the other end. The covering shell 32 is adapted to fit the inlet connector 11 of the pole, and the connecting component 34 is used to fit with the connector head of the electrical component. The elastic insulating cover 3 completely covers the corresponding conductive sheet. Furthermore, the elastic insulating cover 3 is equipped with a conduit 33, which is integrally connected between the covering shell 32 and the connecting component 34, for the conductive sheet to pass through. The connecting component 34, the conduit 33, and the covering shell 32 are integrally molded from soft silicone rubber. Of course, the elastic insulating cover on the outlet connector 12 can also have a covering shell 32 at one end, a connecting component 34 at the other end, and a conduit 33 in the middle.

[0038] Specifically, the root of the ball-shaped connector is narrowed to form the annular recess 14; the portion of the elastic insulating cover 3 that is adapted to the ball-shaped connector has a spherical cover structure, and its edge is embedded in the annular recess 14 to form a snap-fit.

[0039] Specifically, at least one annular recess is formed on the outer periphery of the root of the cylindrical connector; the portion of the elastic insulating cover 3 that adapts to the cylindrical connector has a cylindrical structure, and its inner ring is provided with a protruding ring 31 that engages with the annular recess 14. The head of the cylindrical connector may have a spherical structure.

[0040] Specifically, the conductive piece 2 is fastened to the connector by screws, achieving electrical connection. The screws are screwed into the connector and covered by the elastic insulating cover 3. The connector head has a screw channel 15 that is perpendicular to the insertion interface 13. The screw passes through the screw channel 15 and fastens the conductive piece 2 inside the insertion interface 13 to the connector; or the insertion interface 13 at the connector head extends to one side to form an open lateral port. The screw passes through the lateral port and fastens the conductive piece 2 to the connector. The pole post 1 is a column. The inlet connector 11 is located at the upper end of the pole post 1, and the outlet connector 12 is located on the side wall of the pole post 1; and the insertion interface 13 is located at the upper end of the inlet connector 11 and the outlet connector 12.

[0041] Example 1: Working principle of cylindrical connector:

[0042] In this embodiment, a cylindrical inlet connector 11 is provided at the upper end of the vertical pole 1, and a cylindrical outlet connector 12 is provided on the side wall. The insertion interface 13 of each connector head extends to one side to form an open lateral port.

[0043] When insulating the cylindrical inlet connector, (1) insert the conductive sheet: insert the corresponding conductive sheet into the elastic insulating cover and insert it downward into the plug interface 13 of the inlet connector. Place the elastic insulating cover on the inlet connector and fix it with the annular recess 14. (2) fold the insulating cover to expose the side port: the insulating cover is made of elastic material and can be folded outward to expose the side port of the plug interface 13. (3) tighten the conductive sheet with screws: pass the screw through the side port of the plug interface 13 and the through hole on the conductive sheet, and screw it into the inside of the connector to tighten the conductive sheet in the plug interface and realize the electrical connection. (4) fold the insulating cover back to complete the seal: restore the folded insulating cover so that its edge is inserted into the annular recess 14 at the root of the connector and covers the side port. At the same time, the conduit 33 wraps the exposed part of the conductive sheet, and the connecting part 34 fits with the connecting head of the external electrical component such as the disconnecting switch to finally form a fully enclosed insulating structure. The screw and the connection point are completely covered in the insulating cover.

[0044] When insulating the cylindrical outlet connector, (1) insert the conductive sheet: insert the corresponding conductive sheet into the elastic insulating cover and insert it downward into the plug interface 13 of the outlet connector, put the elastic insulating cover on the outlet connector, and fix it with the annular recess 14; (2) fold the insulating cover to expose the side port: the insulating cover is made of elastic material and can be folded outward to expose the side port of the plug interface 13; (3) tighten the conductive sheet with screws: pass the screw through the side port of the plug interface 13 and the through hole on the conductive sheet, and screw it into the inside of the connector to tighten the conductive sheet in the plug interface and realize the electrical connection; (4) fold the insulating cover back to complete the seal: restore the folded insulating cover so that its edge is inserted into the annular recess 14 at the root of the connector and covers the side port.

[0045] Example 2. Working principle of ball-shaped joint:

[0046] In this embodiment, a ball-shaped inlet connector 11 is provided at the upper end of the vertical pole 1, and a ball-shaped outlet connector 12 is provided on the side wall. Each connector is provided with a screw hole 15.

[0047] When insulating the incoming connector, (1) insert the conductive sheet: insert the corresponding conductive sheet into the elastic insulating cover and insert it downward into the plug interface 13 of the incoming connector. Put the elastic insulating cover on the incoming connector and fix it with the annular recess 14; (2) fold the insulating cover to expose the screw hole. The insulating cover is made of elastic material and can be folded outward to expose the screw hole 15 on the side; (3) tighten the screw to secure the conductive sheet: pass the screw through the screw hole and the through hole on the conductive sheet and screw it into the inside of the connector to secure the conductive sheet in the plug interface and realize the electrical connection; (4) fold the insulating cover back to complete the seal: restore the folded insulating cover so that its edge is inserted into the annular recess 14 at the root of the connector and covers the screw hole. At the same time, the conduit 33 wraps the exposed part of the conductive sheet, and the connecting part 34 fits with the connecting head of the external electrical component such as the disconnecting switch to finally form a fully enclosed insulating structure. The screw and the connection point are completely covered in the insulating cover.

[0048] When insulating the outlet connector, (1) insert the conductive sheet: insert the corresponding conductive sheet into the elastic insulating cover and insert it downward into the plug interface 13 of the outlet connector, put the elastic insulating cover on the outlet connector, and fix it with the annular recess 14; (2) fold the insulating cover to expose the screw hole. The insulating cover is made of elastic material and can be folded outward first to expose the screw hole 15 on the side; (3) tighten the screw to secure the conductive sheet: pass the screw through the screw hole and the through hole on the conductive sheet, and screw it into the inside of the connector to secure the conductive sheet in the plug interface and realize the electrical connection; (4) fold the insulating cover back to complete the seal: restore the folded insulating cover so that its edge is inserted into the annular recess 14 at the root of the connector and covers the screw hole.

[0049] During operation, when the ambient humidity increases, the elastic insulating cover seals and insulates the joint, effectively preventing moisture from entering the interior. If the circuit breaker vibrates during opening and closing, the snap-fit ​​structure between the annular recess and the edge of the insulating cover can limit the displacement of the insulating cover and prevent it from falling off.

[0050] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0051] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A circuit breaker with a fully insulated disconnection device, comprising a pole (1), wherein the pole (1) is provided with an inlet connector (11) and an outlet connector (12), wherein the outlet connector is provided with a plug-in interface (13) for inserting a conductive sheet (2), the root of which is connected to the pole (1), characterized in that: Each of the joints is fitted with an elastic insulating cover (3). The joint is spherical or cylindrical, and an annular recess (14) is provided on the outer periphery of its root. The elastic insulating cover (3) is adapted to cover the outside of the corresponding joint to form insulation and to form a snap-fit ​​with the annular recess (14).

2. The circuit breaker with a fully insulated disconnection device according to claim 1, characterized in that: The root of the ball-shaped connector is narrowed to form the annular recess (14); the portion of the elastic insulating cover (3) that is adapted to the ball-shaped connector has a ball cover structure, and its edge is embedded in the annular recess (14) to form a snap-fit.

3. The circuit breaker with a fully insulated disconnection device according to claim 1, characterized in that: At least one annular recess (14) is provided on the outer periphery of the root of the cylindrical connector; the portion of the elastic insulating cover (3) that is adapted to the cylindrical connector is cylindrical in shape, and a protruding ring (31) is provided on its inner ring to engage with the annular recess (14).

4. The circuit breaker with a fully insulated disconnection device according to claim 1, 2, or 3, characterized in that: The head of the cylindrical connector has a spherical structure.

5. The circuit breaker with a fully insulated disconnection device according to claim 1, 2, or 3, characterized in that: The elastic insulating cover (3) on the inlet connector (11) has a cover shell (32) at one end and a connecting part (34) at the other end. The cover shell (32) is adapted to fit the inlet connector (11) of the pole. The connecting part (34) is used to fit with the connector of the electrical component. The elastic insulating cover (3) completely covers the corresponding conductive sheet.

6. The circuit breaker with a fully insulated disconnection device according to claim 1, 2, or 3, characterized in that: The elastic insulating cover (3) is provided with a conduit (33) for the conductive sheet to pass through.

7. The circuit breaker with a fully insulated disconnection device according to claim 1, 2, or 3, characterized in that: The elastic insulating cover (3) is integrally molded from soft silicone rubber material.

8. The circuit breaker with a fully insulated disconnection device according to claim 1, 2, or 3, characterized in that: The conductive sheet (2) is fastened to the connector by screws and an electrical connection is achieved. The screws are screwed into the connector and covered by the elastic insulating cover (3).

9. The circuit breaker with a fully insulated disconnection device according to claim 8, characterized in that: The connector head is provided with a screw hole (15) that is perpendicular to the plug interface (13). The screw passes through the screw hole (15) and fastens the conductive piece (2) in the plug interface (13) to the connector; or the plug interface (13) of the connector head extends to one side to form an open side port. The screw passes through the side port and fastens the conductive piece (2) to the connector.

10. The circuit breaker with a fully insulated disconnection device according to claim 1, 2, or 3, characterized in that: The pole (1) is a column, the inlet connector (11) is located at the upper end of the pole (1), and the outlet connector (12) is located on the side wall of the pole (1); and the plug interface (13) is provided at the upper end of the inlet connector (11) and the outlet connector (12).

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