Solid-sealed polar pole of circuit breaker switch

Abstract

The utility model relates to a solid-sealed polar pole of a breaker switch, which comprises an epoxy resin casting body, a vacuum arc-extinguishing chamber, a conducting bar and a cam assembly, the other end of the epoxy resin casting body is provided with an accommodating groove for accommodating the cam assembly, and the cam assembly comprises a fixed seat, two cams, a driving shaft and two rollers. The fixing base is provided with four supporting legs distributed in a rectangular array mode, four positioning grooves matched with the four supporting legs are formed in the containing groove, four copper inserts are arranged in the four positioning grooves, the four supporting legs are arranged in the four positioning grooves respectively, and the four copper inserts are arranged in the four copper inserts respectively. And fasteners connected with the four copper inserts are respectively arranged on the four supporting legs. The utility model has the advantages of simple structure, compact structure, high expansibility, stable and reliable performance, good insulation performance, high assembly efficiency and high protection.

Description

Technical Field

[0001] This utility model relates to a circuit breaker switch, specifically to a solid-sealed pole of a circuit breaker switch. Background Technology

[0002] A ring main unit (RMU) is a set of electrical transmission and distribution equipment housed in a metal or non-metal insulated cabinet or assembled into a modular ring main unit. It typically uses sulfur hexafluoride (SF6), environmentally friendly gases, or epoxy resin as the insulating medium. For the rapidly developing power industry, using environmentally friendly gases as the insulating medium will be a significant future trend in the switchgear industry. The advantage of existing circuit breaker switches used in environmentally friendly gas cabinets lies in their maintenance-free characteristics. The switches employ a sealed enclosure structure, eliminating the threat of gas leakage and effectively isolating them from external contaminants, dust, and acid mist. This ensures the cleanliness of the operating environment and extends the service life of the busbars, circuit breakers, isolating switches, and grounding switches, achieving maintenance-free operation and significantly reducing the investment in distribution network operation and maintenance. However, the existing vacuum interrupter components of circuit breaker switches have exposed conductive parts, unreliable insulation performance, and poor protection. Furthermore, these vacuum interrupter components cannot be modularized, making assembly cumbersome. They also suffer from complex structural design and unreliable performance. Summary of the Invention

[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a solid-sealed pole for a circuit breaker switch that is simple in structure, compact in structure, highly expandable, stable and reliable in performance, good insulation performance, high assembly efficiency and high protection.

[0004] To achieve the above objectives, this utility model employs a solid-sealed pole for a circuit breaker switch, comprising an epoxy resin casting body, a vacuum interrupter chamber disposed within the epoxy resin casting body, a conductive busbar disposed at one end of the epoxy resin casting body and connected to one end of the vacuum interrupter chamber, and a cam assembly for driving a lever of the vacuum interrupter chamber to perform opening and closing actions. The other end of the epoxy resin casting body has a receiving groove for accommodating the cam assembly. The cam assembly includes a fixed seat disposed within the receiving groove, two cams rotatably disposed on the fixed seat and linked with a main shaft, a drive shaft for driving the lever action, and two rollers linked on the drive shaft and slidably disposed within the arc-shaped sliding holes of the two cams. The fixed seat is provided with four support feet arranged in a rectangular array. The receiving groove is provided with four positioning grooves that cooperate with the four support feet. Four copper inserts are disposed within the four positioning grooves. The four support feet are respectively disposed within the four positioning grooves, and fasteners connected to the four copper inserts are respectively disposed on the four support feet.

[0005] The beneficial effects of the above structure are as follows: the three vacuum interrupters are respectively housed within the epoxy resin casting, employing a fully encapsulated design, resulting in a more compact and smaller structure with better protection, insulation, and electrical performance. The four support legs of the mounting base are connected to the copper inserts of the epoxy resin casting, facilitating the assembly of the mounting base with the epoxy resin casting. Furthermore, the cam assembly is positioned within the receiving groove of the epoxy resin casting, ensuring the insulation performance of the cam assembly. Therefore, the encapsulated pole of this circuit breaker switch possesses advantages such as simple and compact structure, stable and reliable performance, good insulation, high assembly efficiency, and high protection.

[0006] Specifically, the mounting base has two fixing blocks on both sides, each with a fixing hole. The pull rod has a flexible connector, and a bolt connecting to the fixing hole is attached to a copper busbar at one end of the flexible connector. The two fixing holes on both sides of the mounting base allow for bidirectional extension of the flexible connector, enabling flexible connection to be flexibly assembled according to user needs. This provides high expandability and greater convenience for users.

[0007] Specifically, the epoxy resin casting body is provided with multiple fixing inserts arranged in a rectangular array. The fixing inserts facilitate the installation of the solidified electrode post, making installation more convenient.

[0008] Specifically, a skirt is provided on the outer peripheral wall of the epoxy resin casting at the location between the fixing insert and the conductive copper busbar. The skirt can increase the creepage distance between the fixing insert and the conductive copper busbar, thereby improving the insulation performance of the sealed electrode post.

[0009] Specifically, one end of the epoxy resin casting has an insulating cover that covers one side of the conductive copper busbar. The insulating cover covering the conductive copper busbar prevents the conductive copper busbar from being exposed to the epoxy resin casting, resulting in better insulation performance.

[0010] Specifically, the epoxy resin casting body has reinforcing ribs on the side corresponding to the insulating cover. These reinforcing ribs enhance the overall strength of the epoxy resin casting body, thereby helping to extend the service life of the circuit breaker's solid-sealed pole.

[0011] Specifically, the pull rod is equipped with a spring assembly that cooperates with the drive shaft. The spring assembly includes a first spring seat mounted on the pull rod, a second spring seat mounted on the pull rod and linked to the drive shaft, and a spring fitted onto the pull rod. The two ends of the spring respectively abut against the first spring seat and the second spring seat. The spring assembly adopts a modular design, which facilitates the assembly of the pull rod and the spring assembly, making assembly more convenient. Furthermore, the spring assembly, combined with the pull rod, performs opening and closing actions, thereby accelerating the opening and closing speed of the circuit breaker assembly. Attached Figure Description

[0012] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0013] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.

[0014] Figure 3 This is an exploded view of an embodiment of the present utility model. Detailed Implementation

[0015] like Figures 1-3As shown, this utility model embodiment is a solid-sealed pole of a circuit breaker switch, including an epoxy resin casting body 10, a vacuum interrupter 11 disposed within the epoxy resin casting body 10, a conductive bus 12 disposed on one end of the epoxy resin casting body 10 and connected to one end of the vacuum interrupter 11, and a cam assembly 20 for driving a pull rod 111 of the vacuum interrupter 11 to perform opening and closing actions. The other end of the epoxy resin casting body 10 has a receiving groove 100 for accommodating the cam assembly 20. The cam assembly 20 includes a fixed seat 21 disposed within the receiving groove 100, and two convex protrusions rotatably disposed on the fixed seat 21 and linked with a main shaft 13. The system includes a wheel 22, a drive shaft 23 for driving the pull rod 111, and two rollers 24 linked to the drive shaft 23 and slidably mounted in the arc-shaped sliding holes 221 of the two cams 22. The fixed base 21 has four support feet 211 arranged in a rectangular array. The receiving groove 100 has four positioning grooves 101 that mate with the four support feet 211. Each of the four positioning grooves 101 contains a copper insert 102. The four support feet 211 are respectively positioned within the four positioning grooves 101, and each support foot 211 has a fastener connected to one of the four copper inserts 102. The fixed base 21 has two fixing blocks 212 on both sides, each with a fixing hole 213. The pull rod 111 has a flexible connector 25, and a bolt connected to the fixing hole 213 is mounted on a copper busbar 251 at one end of the flexible connector 25. Two fixing holes are provided on both sides of the fixing base, which allows for the double-sided lead-out of the flexible connection, achieving bidirectional expansion. The flexible connection can be flexibly assembled according to user needs, making it more convenient for users. Multiple fixing inserts 14 are arranged in a rectangular array on the epoxy resin casting body 10. The epoxy resin casting body is installed through the fixing inserts, facilitating the installation of the solidified electrode post and making installation more convenient. A skirt 103 is provided on the outer peripheral wall of the epoxy resin casting body 10 between the fixing insert 14 and the conductive copper busbar 12. The skirt increases the creepage distance between the fixing insert and the conductive copper busbar, thereby improving the insulation performance of the solidified electrode post. One end of the epoxy resin casting body 10 has an insulating cover 104 covering one side of the conductive copper busbar 12. The insulating cover covering one side of the conductive copper busbar prevents the conductive copper busbar from being exposed outside the epoxy resin casting body, resulting in better insulation performance. A reinforcing rib 105 is provided on the epoxy resin casting body 10 corresponding to the insulating cover 104. The reinforcing ribs can enhance the overall strength of the entire epoxy resin casting, thereby helping to extend the service life of the circuit breaker's solid-sealed pole.

[0016] like Figure 2As shown, the pull rod 111 is equipped with a spring assembly 30 that cooperates with the drive shaft 23. The spring assembly 30 includes a first spring seat 31 disposed on the pull rod 111, a second spring seat 32 disposed on the pull rod 111 and linked with the drive shaft 23, and a spring 33 fitted on the pull rod 111. The two ends of the spring 33 respectively abut against the first spring seat 31 and the second spring seat 32. The spring assembly adopts a modular structure design, which facilitates the assembly of the pull rod and the spring assembly, making assembly more convenient. Furthermore, the spring assembly can be combined with the pull rod to perform opening and closing actions, thereby helping to accelerate the opening and closing speed of the circuit breaker assembly.

[0017] Three vacuum interrupters are housed within epoxy resin castings, employing a fully encapsulated design. This design results in a more compact and efficient structure, offering superior protection, insulation, and electrical performance. The four support legs of the mounting base are connected to copper inserts within the epoxy resin casting, facilitating assembly between the base and the casting. Furthermore, the cam assembly is positioned within a recessed groove within the epoxy resin casting, ensuring its insulation performance. Therefore, the encapsulated pole of this circuit breaker switch possesses advantages such as simple and compact structure, high scalability, stable and reliable performance, excellent insulation, high assembly efficiency, and high protection.

Claims

1. A solid-sealed pole of a circuit breaker switch, characterized in that: The device includes an epoxy resin casting body, a vacuum interrupter chamber disposed within the epoxy resin casting body, a conductive busbar disposed at one end of the epoxy resin casting body and connected to one end of the vacuum interrupter chamber, and a cam assembly for driving a lever of the vacuum interrupter chamber to perform opening and closing actions. The other end of the epoxy resin casting body has a receiving groove for accommodating the cam assembly. The cam assembly includes a fixed seat disposed within the receiving groove, two cams rotatably disposed on the fixed seat and linked with a main shaft, a drive shaft for driving the lever, and two rollers linked on the drive shaft and slidably disposed within arc-shaped sliding holes of the two cams. The fixed seat is provided with four support feet arranged in a rectangular array. The receiving groove is provided with four positioning grooves that mate with the four support feet. Four copper inserts are disposed within the four positioning grooves. The four support feet are disposed within the four positioning grooves, and fasteners connected to the four copper inserts are disposed on the four support feet.

2. The solid-sealed pole of the circuit breaker switch according to claim 1, characterized in that: The fixed base has two fixing blocks on both sides, and each fixing block has a fixing hole. The pull rod has a flexible connection, and a bolt connected to the fixing hole is provided on the copper busbar at one end of the flexible connection.

3. The solid-sealed pole of the circuit breaker switch according to claim 1 or 2, characterized in that: The epoxy resin casting body is provided with multiple fixing inserts arranged in a rectangular array.

4. The solid-sealed pole of the circuit breaker switch according to claim 3, characterized in that: A skirt is provided on the outer peripheral wall of the epoxy resin casting body at the position between the fixing insert and the conductive copper busbar.

5. The solid-sealed pole of the circuit breaker switch according to claim 1 or 2, characterized in that: The epoxy resin casting has an insulating cover at one end that covers one side of the conductive copper busbar.

6. The solid-sealed pole of the circuit breaker switch according to claim 5, characterized in that: The epoxy resin casting body has reinforcing ribs on one side corresponding to the insulating cover.

7. The solid-sealed pole of the circuit breaker switch according to claim 1 or 2, characterized in that: The pull rod is equipped with a spring assembly that cooperates with the drive shaft. The spring assembly includes a first spring seat on the pull rod, a second spring seat on the pull rod and linked with the drive shaft, and a spring fitted on the pull rod. The two ends of the spring respectively abut against the first spring seat and the second spring seat.

Images